Tommo So

Tommo So contains 17 vowel phonemes. There are seven basic vowels spanning four vowel heights and three vowel backnesses.

Besides the 7 basic vowels, Tommo So's vowel inventory includes their long counterparts and 3 nasalized long vowels. The placement of vowels in words does not affect their length—long vowels tend to be about 138ms long, and short vowels tend to be about 67 ms long. The nasalized vowels /iːⁿ/ and /uːⁿ/ are present in the language but occur infrequently and irregularly, and are not considered phonemic.[7]

Tommo So contains 17 consonants. There are 5 places and 6 manners of articulation. Consonant length is contrastive—for example, [dɛ̀nnɛ́] and [dɛ̀nɛ́] are considered to be different words—the first means 'look for', and the second means 'spend the day'.[8]

The consonant inventory includes the alveolo-palatal affricate [dʑ]—the consonant [ʑ] does not appear by itself. There are a few other consonants sounds that occur in consonant speech (such as [ʔ] and [tɕ]). However, these sounds occur only in ideophones, and are not considered part of Tommo So's consonant inventory.[10]

There are eight syllable types in Tommo So: (C)V, (C)Vː (C)VR, (C)VC, N, NCV, NCVː, and CVV. N represents a nasal consonant, and R represents a sonorant. A (C)VC syllable must be followed by an onset identical to this coda. Some examples of these syllable structures are provided below.[11]

Tone is significant both lexically and grammatically. Tommo So contains two tones, high (H) and low (L).[12] Based on an analysis of recorded words, the distribution and placement of H and L tones seem to be governed by a set of patterns that are relatively unpredictable for nouns, numerals, and adjectives, and predictable for verbs.[13]

Almost all syllables have an associated H or L tone, and every stem must contain at least one H tone. Although tones are contrastive, there are very few minimal pairs that are only tonally distinctive. A few examples are listed below.

Tommo So, like other Dogon languages, uses tonal overlays. A stem's tones are overwritten by a pre-determined tone overlay depending on the context in which the stem appears.[15] Verb phrases' tones are replaced based on inflectional morphology, and only affect the verb stem. As an example, main clauses' affirmative imperfect overlay is {HL}, and their negative imperfect overlay is {L}. Relative clauses' affirmative imperfect overlay does not change tones, and their negative imperfect overlay is {L}.[16] Given the noun stem [jɔ̀bɔ́] ('run') of the /LH/ tone class, conjugation would result in the following.

Noun phrases' tones are replaced based on the relationship between words in the noun phrase, and can affect multiple words. Although verb phrase tonal overlays are strictly defined for all verbs, noun phrase tonal overlays are dependent on the object in the noun phrase being possessed or not.[18]

As an agglutinative language, the affixation of morphemes plays a major role in Tommo So's morphology. Almost all of the language's bound morphemes are used as suffixes—prefixes are only seen in the form of reduplication, when used for deadjectival nominalization.

Tommo So contains five verbal derivational suffixes, listed below.[19]

There are some cases in which the 'reversive' suffix -ílɛ́ does not seem to contain a reversive meaning. For example, the word yàmá means 'be ruined', but the word 'yàm-ílɛ́' means 'ruin.' Some derivational suffixes just happen to carry "no discernable meaning at all."[23]

Tommo So does not contain much nominal morphology—the only two meaningful suffix types that attach to nouns are those that implement a human/non-human system and the diminutive suffix -ý. In the case below, íí is an allomorph of -ý.[2]

There are a few clitics in Tommo So, including a plural marker =mbe and a definite marker =gɛ (an example showing both is given below). Clitics are always attached to the end of an entire noun phrase rather than the noun itself.

In general, clitics are always attached to the end of a stem, and never the beginning.

Reduplication is used for different purposes in Tommo So's morphology. The first is deadjectival nominalization, and the second is adjectival distribution.

The process of nominalizing an adjective requires for the adjective stem to be reduplicated, either in part or in whole. At minimum, the first syllable is reduplicated. However, in the case of multisyllabic adjectives, up to the entire word can be reduplicated. A tone shift also occurs during this process. Regardless of how much of the original word is duplicated, the resultant noun has the same meaning.[26]

The reduplication of an adjective is used to distribute its meaning across a given number of objects.

There are two types of compounding in Tommo So: nominal compounding and adjectival compounding.

About a third of the known lexicon of Tommo So consists of nominal compounds, of which most are right-headed.[29] Some examples of nominal compounds are provided below.

Bahuvrihi compounding in Tommo So occurs when a complex noun is created by attaching an adjective to the end of a noun.

Tommo So's basic word order is subject-object-verb (SOV).[33] Examples of this are shown below.