Yorùbá Grammars and Linguistic Description

Yorùbá grammatical description is the systematic study of how the Yorùbá language structures its sounds, words, clauses, and regional varieties. Over the past century, linguists have moved from early missionary wordlists to formal theoretical analyses of the language's isolating syntax, tonal morphology, and dialect continuum. This file examines the core reference grammars that established the discipline, analyzes three foundational debates in Yorùbá syntax, and details the dialectological frameworks used to classify regional forms of the language.

Foundations of Yorùbá Grammatical Description

The formal description of Standard Yorùbá syntax and morphology in the mid-twentieth century developed through distinct descriptive and theoretical traditions. Four foundational texts define the parameters of modern Yorùbá grammar, presenting contrasting methodologies ranging from systemic-functional linguistics and distribution-based structuralism to applied pedagogical models.

┌──────────────────────────────────────────────────────────────────────────┐
│             CORE GRAMMATICAL TRADITIONS IN YORÙBÁ LINGUISTICS            │
├───────────────────────┬──────────────────────────────────────────────────┤
│ Structural / Formal   │ • Ayọ̀ Bamgboṣe (1966): Scale & Category model    │
│ Descriptions          │ • Ọladele Awobuluyi (1978): Distribution-based   │
├───────────────────────┼──────────────────────────────────────────────────┤
│ Pedagogical Reference │ • P. O. Ogunbọ́wálé (1970): Applied secondary grammar│
│ Grammars              │ • E. C. Rowlands (1969): Non-native learner model │
└───────────────────────┴──────────────────────────────────────────────────┘

Ayọ̀ Bamgboṣe and the Systemic Description

Ayọ̀ Bamgboṣe's A Grammar of Yoruba represents the first full-scale structural description of Standard Yorùbá formulated within a contemporary general linguistic framework 1. Grounded in M. A. K. Halliday's Scale and Category model, Bamgboṣe constructed an explicit hierarchical taxonomy that divides the grammatical system into five distinct ranks: sentence, clause, group, word, and morpheme 1.

Within this framework, Bamgboṣe demonstrated that Yorùbá sentence structure operates through clause classes that are either free or bound, establishing rigorous criteria for distinguishing subordinate structures from coordinate and serial linkings 1. At the group rank, his model divided constituents into nominal groups and verbal groups, providing an exhaustive account of modifying and qualifying nominals, pronominal forms, and the interactions of verbal particles 1. Bamgboṣe's analysis accounted systematically for tonal phonology within the grammar, showing how grammatical tone operates at morpheme boundaries, particularly in verbal modification, nominalization processes, and the formation of multi-verb sequences 1.

Ọladele Awobuluyi and Distributional Taxonomy

Ọladele Awobuluyi's Essentials of Yoruba Grammar introduced a structural, distribution-based taxonomy designed explicitly to liberate Yorùbá grammatical description from Eurocentric and Latin-based categories 2. Awobuluyi argued that traditional descriptions frequently imported Indo-European categories such as prepositions, adverbs, and adjectives that did not reflect the functional distributions of Yorùbá morphemes 2.

Awobuluyi's classification established strict distributional tests for word classes, organizing the lexicon into nominal forms, verbs, adverbs, conjunctions, and interjections 2. He categorized nominals based on their ability to occupy subject and object positions, the mechanisms by which they take qualifiers, and their behavior under negation and focus 2. His syntactic treatment provided comprehensive classifications of noun phrases, verb phrases, ideophones, negation particles, and postpositions, establishing a standard descriptive framework that remains central to Yorùbá linguistic education 2.

Pedagogical Reference Grammars: Ogunbọ́wálé and Rowlands

Alongside formal structural monographs, descriptive reference grammars were developed to serve pedagogical and applied domains. P. O. Ogunbọ́wálé's The Essentials of the Yoruba Language provided a comprehensive reference grammar aimed at secondary and university learners 3. Ogunbọ́wálé concentrated on the applied mechanics of the language, covering orthographic conventions, vowel harmony rules, tonal alterations, elision, contractions, and derivational morphology 3. Unlike strictly theoretical treatments, Ogunbọ́wálé integrated applied stylistic elements, including the syntactic structure of idiomatic expressions and proverb forms, bridging descriptive syntax and literary usage 3.

E. C. Rowlands's Teach Yourself Yoruba served as an introductory structural grammar tailored for non-native learners 4. Rowlands systematically organized the language's tonal system, presenting practical descriptions of high, mid, and low pitch distinctions alongside junction phenomena, such as vowel assimilation and elision at lexical boundaries 4. The work detailed the behavior of tense-aspect-mood (TAM) particles, object pronoun contraction rules, and basic multi-verb constructions, establishing an accessible entry point for foreign learners while maintaining phonological and syntactic rigor 4.

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Major Theoretical Disagreements in Word Classification

The descriptive literature contains long-standing debates regarding how specific lexical items and word classes ought to be categorized. These disputes reflect fundamental disagreements between distribution-based structuralism and universalist syntactic frameworks.

┌──────────────────────────────────────────────────────────────────────────┐
│                    WORD CLASS DISPUTES IN YORÙBÁ                         │
├──────────────────────┬───────────────────────────────────────────────────┤
│ The Status of        │ • Bamgboṣe / Traditional: Distinct word class     │
│ Adjectives           │ • Awobuluyi: Stative verbs or qualifying nouns    │
├──────────────────────┼───────────────────────────────────────────────────┤
│ Multi-Verb Sequence  │ • Bamgboṣe / Rowlands: Serial verb constructions  │
│ Elements (fi, bá)    │ • Awobuluyi: Prepositions / auxiliary modifiers   │
└──────────────────────┴───────────────────────────────────────────────────┘

The Adjective Debate

A central theoretical disagreement between Awobuluyi and other descriptive grammarians concerns the existence of an independent word class of adjectives in Yorùbá 23.

Traditional and pedagogical accounts, including those of Ogunbọ́wálé, maintain adjectives as a distinct part of speech, identifying qualifying words that follow nouns as descriptive adjectives 3. Awobuluyi contested this classification, arguing on distributional grounds that Yorùbá lacks a distinct category of adjectives 2. He demonstrated that words translated as adjectives in European languages fall into one of two native classes:

1. Stative Verbs: Predicative elements that directly take tense-aspect markers and negate like dynamic verbs.
2. Qualifying Nominals: Nouns that modify other nouns through associative or qualifying constructions, exhibiting the distributional properties of the nominal class 2.

Awobuluyi's position eliminated the adjective as a primary part of speech, reducing nominal modification to nominal-nominal juxtaposition or relative clause modification headed by stative verbs 2.

Serial Verbs versus Prepositions and Auxiliaries

A second major debate centers on the lexical status of morphemes such as fi ("use/with"), bá ("accompany/with"), and fún ("give/for") when they appear in multi-verb sequences 124.

Ayọ̀ Bamgboṣe and E. C. Rowlands analyzed sequences containing these items as serial verb constructions (SVCs), treating each element in the verbal string as a verb heading its own component of a complex action 14. Under this analysis, fi is a lexical verb meaning "to use" that occurs in series with a following lexical verb.

In contrast, Awobuluyi applied strict distributional tests to demonstrate that items like fi and bá lack the full syntactic freedom of primary lexical verbs 2. He showed that these morphemes cannot occur in isolation as the sole predicate of an independent clause without a following verb, cannot be nominalized through prefixation or reduplication in the same manner as primary verbs, and exhibit defective paradigm behaviors 2. Consequently, Awobuluyi classified these items as prepositions, auxiliary elements, or verb-modifying adverbs rather than full lexical verbs in a serial relationship 2.

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Syntactic Architecture and Core Theoretical Debates

In generative and theoretical syntax, Yorùbá has served as a critical testing ground for cross-linguistic theories of clause structure, movement, predication, and the syntax-phonology interface. Three debates define modern Yorùbá syntax research: serial verb constructions, focus fronting, and the grammatical status of the High Tone Syllable.

┌──────────────────────────────────────────────────────────────────────────┐
│                 MAJOR SYNTACTIC DEBATES IN YORÙBÁ                        │
├──────────────────┬───────────────────────────────────────────────────────┤
│ Serial Verb      │ • Single-clause VP shells / object sharing (Baker)    │
│ Constructions    │ • Complex multi-clause derivation (Lawal)             │
│                  │ • Modifying vs Coordinating typology (Bamgboṣe)       │
├──────────────────┼───────────────────────────────────────────────────────┤
│ Focus Structures │ • Mono-clausal movement to [Spec, FocP] (Aboh)        │
│ with 'ni'        │ • Copular base-generation + null operator (Adesola)   │
│                  │ • Predicate nominalization constraint (Awobuluyi)     │
├──────────────────┼───────────────────────────────────────────────────────┤
│ High Tone        │ • Tense / non-future marker (Awobuluyi)               │
│ Syllable (HTS)   │ • Subject agreement head in Infl/T (Déchaine)         │
│                  │ • Epistemic / pragmatic semantic operator (Bisang &   │
│                  │   Sonaiya)                                            │
└──────────────────┴───────────────────────────────────────────────────────┘

Serial Verb Constructions: Mono-clausal Projection versus Multi-clausal Derivation

Serial Verb Constructions (SVCs) are sequences of verbs or verb phrases acting together within a single clause without overt coordination or subordination markers. Theoretical debate has focused on clausal architecture, headedness, and object sharing 567.

Object Sharing and Argument Projection

Mark C. Baker analyzed Yorùbá object-sharing serial verb constructions within generative syntactic theory, arguing that they are base-generated single clauses 5. In Baker's model, two transitive verbs project a single, shared object noun phrase (NP) dominated simultaneously by both verb projections 5. This configuration satisfies the Projection Principle and theta-assignment requirements without requiring empty categories or secondary clausal nodes 5.

Typology: Coordinating versus Modifying

Ayọ̀ Bamgboṣe established a structural typology dividing Yorùbá SVCs into two broad categories: modifying serial constructions and coordinating serial constructions 6.

• In modifying serial constructions, the initial or subsequent verb functions semantically and syntactically to qualify, limit, or direct the action of the primary lexical verb (as seen in instrumental fi or directional sequences) 6.
• In coordinating serial constructions, the verbs designate distinct, consecutive, or concurrent events that could theoretically be conjoined using coordinating conjunctions without altering the basic semantic argument relationships 6.

Mono-clausal versus Complex Underlying Sentences

S. Adenike Lawal contested purely mono-clausal models, investigating whether Yorùbá SVCs are base-generated simple sentences or derive from underlying complex sentences through transformational deletion 7. Lawal examined the distribution of aspectual markers, negation scope, and adverbial modification across serial verbs, concluding that certain classes of Yorùbá serial constructions preserve structural properties of underlying multi-clausal structures that undergo subsequent syntactic reduction 7.

The debate remains divided between scholars who analyze SVCs as multi-headed event structures within a single extended VP shell and those who view them as reduced subordinate clauses or asymmetric adjunction structures 567.

Focus Constructions: The Syntax of the Ni Particle

Focus constructions in Yorùbá obligatorily feature the particle ni immediately following the fronted or focused constituent 289. The nature of ni and the mechanism of constituent extraction are central to theoretical investigations of the left periphery.

Mono-clausal Movement (Aboh):
[FocP Constituent_i [Foc' ni [TP ... t_i ... ]]]

Base-Generated Copular Cleft (Adesola):
[MatrixP Constituent [PredP ni [CP Op_i [TP ... t_i ... ]]]]

Movement to the Left Periphery

Enoch O. Aboh analyzed Yorùbá focus within the Cartographic framework as an instance of mono-clausal $A'$-movement 8. Aboh argued that the focused constituent moves directly from its thematic base position inside the IP/TP to the specifier of a dedicated Focus Phrase ($[\text{Spec, FocP}]$) located in the split CP layer 8. In this analysis, the particle ni is the invariant functional head of the Focus Phrase ($\text{Foc}^0$) that licenses the movement of the focused element to its specifier 8.

Base-Generation and Copular Clefting

Oladiipo Adesola proposed an alternative account, arguing that focus constructions in Yorùbá are underlyingly cleft or copular structures rather than simple mono-clausal movement chains 9. Adesola showed that the focused constituent is base-generated in an ex-situ predicate position dominated by ni, which functions as a defective copular verb 9. Under Adesola's model, the relationship between the focused constituent and the gap in the lower clause is mediated by the movement of an empty operator inside the embedded clause, rather than direct physical movement of the focused XP itself 9.

Predicate Focus and Morphological Constraints

A critical structural property documented across the literature is that verbs cannot be extracted directly into the focus position 2. Ọladele Awobuluyi documented that to focus a verbal predicate, the verb must undergo nominalization via partial reduplication (prefixing a copy of the verb base with a high tone vowel) before it can surface to the left of ni 2. The base lexical verb remains in its canonical predicate position within the clause while the nominalized copy occupies the focus position, illustrating the morphological constraint against verbal heads occupying $[\text{Spec, FocP}]$ directly 28.

Tone in Grammar: The Problem of the High Tone Syllable (HTS)

In Standard Yorùbá declarative clauses, a vocalic segment bearing a high tone (frequently surfacing phonetically as a high-tone vowel lengthening or the pronominal clitic /ó/) appears systematically between an overt non-pronominal subject NP and the following predicate 101112. The grammatical categorization of this High Tone Syllable (HTS) is one of the most contested questions in African linguistics.

Three Syntactic Accounts of the High Tone Syllable (HTS):
1. Awobuluyi:   [TP Subject [T' HTS (Past/Non-Future Tense) [VP Predicate]]]
2. Déchaine:    [IP Subject [I' HTS (Subject Agreement Head) [VP Predicate]]]
3. Bisang &     [Subject NP] + [HTS: Epistemic Validation Operator] + [Predicate]
   Sonaiya:

The HTS as a Tense Marker

Ọladele Awobuluyi argued that the HTS is neither a pronominal element nor an agreement morpheme, but a past or non-future tense marker 10. Awobuluyi observed that the HTS occurs exclusively in specific temporal contexts and is systematically absent in future, progressive, or habitual environments where other overt auxiliary tense-aspect particles are present 10. Because its distribution alternates directly with known TAM markers, Awobuluyi concluded that the HTS occupies the tense node of the clause 10.

The HTS as an Agreement / Infl Head

Rose-Marie Déchaine analyzed the HTS from a category-neutral generative framework, concluding that the HTS represents a functional agreement head situated in $\text{Infl}^0$ or $\text{T}^0$ 11. Déchaine argued that the HTS functions as a structural subject-concord marker that mediates the syntactic relationship between the external argument in the subject position and the predicate phrase 11. In this account, the high tone reflects abstract syntactic agreement rather than tense specification 11.

The HTS as an Epistemic Semantic Operator

Walter Bisang and Remi Sonaiya contested purely syntactic and agreement-based accounts, proposing a pragmatic and semantic functional model 12. Bisang and Sonaiya argued that the HTS functions as an epistemic operator that validates the communicative actualization of the relation between the subject and the predicate 12. Rather than marking grammatical agreement or tense, the HTS signals the speaker's pragmatic assertion of the validity of the proposition, explaining its sensitivity to sentence type, focus, and negation 12.

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Yorùbá Dialectology and Classification Models

Dialectology in Yorùbá linguistics has transitioned from early three-zone classifications to multi-group continuum frameworks based on systematic phonological, morphological, and lexical isoglosses.

┌──────────────────────────────────────────────────────────────────────────┐
│                   YORÙBÁ DIALECT CLASSIFICATION SCHEMES                  │
├───────────────────────┬──────────────────────────────────────────────────┤
│ Tripartite Baseline   │ • North-West Yorùbá (NWY): Ọ̀yọ́, Ìbàdàn, Ẹ̀gbá, Ọ̀ṣun │
│ (Adetugbo 1967)       │ • Central Yorùbá (CY): Ìjẹ̀ṣà, Èkìtì, Ilé-Ifẹ̀,    │
│                       │   Àkúrẹ́                                         │
│                       │ • South-East Yorùbá (SEY): Ìjẹ̀bú, Òǹdó, Ìkálẹ̀,   │
│                       │   Ìlàjẹ, Ọ̀wọ̀                                     │
├───────────────────────┼──────────────────────────────────────────────────┤
│ 5-Group Expansion     │ • North-East Yorùbá (NEY): Okun dialects         │
│ (Fresco 1970;         │   (Ìyàgbà, Ìjùmú, Owé, Ọwọ́rọ̀, Bùnú)               │
│ Akinkugbe 1978)       │ • South-West Yorùbá (SWY): Kétu, Sábẹ́, Ànàgó,   │
│                       │   Ifẹ̀-Togo                                      │
├───────────────────────┼──────────────────────────────────────────────────┤
│ 7-Group Framework     │ • Partitioned into: NWY, CY, SEY, SWY, Western,  │
│ (Adeniyi 2005)        │   NEY, and Eastern Yorùbá (Ùkàrẹ́, Ọ̀bà, Ìdó-Àní) │
└───────────────────────┴──────────────────────────────────────────────────┘

The Tripartite Baseline: Abiodun Adetugbo

The empirical baseline for Yorùbá dialectology was established by Abiodun Adetugbo in his 1967 Columbia University dissertation, The Yoruba Language in Western Nigeria: Its Major Dialect Areas 13. Adetugbo conducted the first systematic dialect survey using mapped phonological and morphosyntactic isoglosses, dividing the language into three primary geographic zones 13:

                       ┌─────────────────────────┐
                       │  North-West Yorùbá     │
                       │  (Ọ̀yọ́, Ìbàdàn, Ẹ̀gbá)   │
                       └────────────┬────────────┘
                                    │
            ┌───────────────────────┴───────────────────────┐
            │                                               │
┌───────────▼─────────────┐                   ┌─────────────▼───────────┐
│     Central Yorùbá      │                   │   South-East Yorùbá     │
│ (Ìjẹ̀ṣà, Èkìtì, Ilé-Ifẹ̀) │                   │ (Ìjẹ̀bú, Òǹdó, Ìkálẹ̀)   │
└─────────────────────────┘                   └─────────────────────────┘

1. North-West Yorùbá (NWY): Encompassing Ọ̀yọ́, Ìbàdàn, Ẹ̀gbá, and Ọ̀ṣun 13. NWY is characterized by a seven-vowel system (/i, e, ẹ, a, ọ, o, u/), the absence of the proto-consonant /gh/, specific vowel elision strategies at word boundaries, and pronoun paradigms that served as the primary foundation for Standard Written Yorùbá 13.
2. Central Yorùbá (CY): Comprising Ìjẹ̀ṣà, Èkìtì, Ilé-Ifẹ̀, and Àkúrẹ́ 13. CY varieties frequently preserve distinct nine-vowel inventories with expansive vowel harmony systems, systematic differences in nominal prefixation, and distinct past/perfective aspectual markers 13.
3. South-East Yorùbá (SEY): Including Ìjẹ̀bú, Òǹdó, Ìkálẹ̀, Ìlàjẹ, and Ọ̀wọ̀ 13. SEY is distinguished by the retention of archaic phonological contrasts, distinct consonant distributions (such as the presence of /gh/ and retention of unvoiced velar fricatives), non-standard third-person pronominal clitics, and unique nominal prefixing patterns 13.

Expansion to Five Zones: Fresco and Akinkugbe

Subsequent research expanded Adetugbo's tripartite model by documenting peripheral dialect clusters that exhibited divergent phonological systems.

Edward Max Fresco investigated the Okun dialects of modern Kogi and Kwara States, formally documenting North-East Yorùbá (NEY) 14. Fresco's field surveys demonstrated that NEY varieties (such as Ìyàgbà, Ìjùmú, Owé, Ọwọ́rọ̀, and Bùnú) possessed conservative phonological and morphological traits, including complex vowel assimilation rules, distinct nasal vowel paradigms, and unique lexical items absent in NWY and CY 14.

Olufẹmi Odutayo Akinkugbe completed a comprehensive comparative phonology of Yorùbá dialects alongside Ìṣẹ̀kírì and Igala, establishing the South-West Yorùbá (SWY) classification 15. SWY encompasses varieties spoken across southwestern Nigeria, the Republic of Benin, and Togo, including Kétu, Sábẹ́, Ànàgó, and Ifẹ̀-Togo 15. Akinkugbe utilized these comparative datasets to reconstruct Proto-Yoruboid phonology, providing rigorous historical-comparative evidence for a unified five-zone framework (NWY, CY, SEY, NEY, and SWY) 15.

Seven-Group Models and Contemporary Dialect Frameworks

Harrison Adeniyi further refined the regional classification of Yorùbá by proposing a seven-group continuum 16. This framework accounts for transitional and peripheral lects that resist classification within earlier broad divisions 16:

• North-Western Yorùbá (Ọ̀yọ́, Ìbàdàn)
• Central Yorùbá (Ìjẹ̀ṣà, Èkìtì, Ifẹ̀)
• South-Eastern Yorùbá (Ìjẹ̀bú, Òǹdó, Ìkálẹ̀)
• South-Western Yorùbá (Kétu, Sábẹ́)
• Western Yorùbá
• North-Eastern Yorùbá (Okun dialects: Ìyàgbà, Ìjùmú, Owé)
• Eastern Yorùbá (incorporating Ùkàrẹ́, Ọ̀bà, and Ìdó-Àní) 16.

The seven-group framework captures the transitional phonological characteristics of Eastern Yorùbá varieties spoken in the borderlands between Ondo, Edo, and Kogi states, which exhibit complex vowel systems and morphological features intermediate between Central Yorùbá, Okun, and neighboring Edoid groups 16.

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Scholarly Disagreements and Empirical Gaps in the Record

Dialectological and descriptive research in Yorùbá linguistics faces unresolved theoretical boundaries and uneven empirical documentation.

┌──────────────────────────────────────────────────────────────────────────┐
│                   EMPIRICAL AND CLASSIFICATION GAPS                      │
├───────────────────────┬──────────────────────────────────────────────────┤
│ Discrete Boundaries   │ • Mapped zones vs. Dialect Continua              │
│ vs Continuum          │ • Transitional lects (e.g., Ìbọ̀lọ̀ sharing NWY/CY)│
├───────────────────────┼──────────────────────────────────────────────────┤
│ Dialect vs Distinct   │ • Status of peripheral lects: Ìcà, Ìdàáshà, Cabe │
│ Language Status       │ • Ìṣẹ̀kírì in Defoid / Proto-Yoruboid (Capo)      │
├───────────────────────┼──────────────────────────────────────────────────┤
│ Empirical Data        │ • Under-documented: Suprasegmental tone acoustics│
│ Deficits              │ • Lack of rural sociolinguistic variation data   │
└───────────────────────┴──────────────────────────────────────────────────┘

Discrete Boundaries versus Dialect Continua

A persistent methodological debate concerns whether Yorùbá dialect groups should be conceptualized as discrete geographical clusters or as a continuous dialect chain 1316. While early studies by Adetugbo drew firm isogloss boundaries 13, subsequent dialect surveys highlight that transitional lects such as Ìbọ̀lọ̀ (spoken in communities between Ọ̀ṣun and Kwara) exhibit an intermediate mixture of NWY vowel elision and CY morphological forms. These intermediate varieties resist assignment to single categorical zones, demonstrating that the speech forms operate as a continuous network of overlapping features.

Dialect versus Language Status in the Defoid Subgroup

Scholars disagree on whether peripheral border varieties and closely related languages constitute dialects of Yorùbá or separate languages within a broader genetic node 1517.

Hounkpati B.C. Capo analyzed the genetic taxonomy of the Defoid language family within Niger-Congo, examining the status of Ìcà, Ìdàáshà, Cabe (Sábẹ́), and Ìṣẹ̀kírì 17. While popular classification schemes often categorize all Yoruboid varieties as dialects of Yorùbá, Capo and Akinkugbe demonstrated that varieties such as Ìṣẹ̀kírì and peripheral Beninese/Togolese varieties form distinct branches within an "Edekiri" or "Proto-Yoruboid" subgroup 1517. The boundaries between a highly divergent Yorùbá dialect and a separate Yoruboid language remain contested, shaped by mutual intelligibility criteria, political geography, and sociolinguistic identification 17.

Empirical Gaps in Current Linguistic Documentation

Despite the depth of syntactic and segmental phonological studies, significant empirical gaps remain in the documented record:

1. Suprasegmental and Acoustic Documentation: The majority of historical and dialectological surveys rely heavily on impressionistic phonetic transcription and segmental phonological inventories (vowel and consonant distributions) 131415. Large-scale acoustic phonetic analyses of tone production, pitch register realization, tonal downstep, and contour realization across rural lects remain unevenly documented.
2. Morphosyntactic Variation Across Dialects: While the syntax of Standard Written Yorùbá has been exhaustively analyzed 1289, comparative syntactic research investigating how focus, serial verb constructions, and negation operate inside non-standard dialects (particularly in NEY and SEY varieties) remains incomplete.
3. Sociolinguistic Variation: Systematic sociolinguistic documentation tracking variation across generation, age, gender, and urbanization within rural speech communities is largely absent from the primary literature, leaving historical sound shifts only partially contextualized within living speech communities.

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