Yimas has a total of 18
phonemes. Below are the vowel and consonant inventories, which are represented using
International Phonetic Alphabet (IPA) symbols.
Consonants The consonant
phoneme inventory of Yimas is typical for the languages of Papua New Guinea. Like many languages of the region, Yimas has no
fricative phonemes, although fricatives do sometimes appear in pronunciation as variants of
plosives. The following table contains the 12 consonant phonemes of the language: The phonemic status of the palatal consonants /c/, /ɲ/ and /ʎ/ is not entirely clear. In general their appearance is predictable; they arise primarily through
palatalization of the alveolar consonants /t/, /n/, and /r/. However, there are a few words in which these consonants must be regarded as underlyingly palatal. Examples include
akulɨm 'wrist',
ɨɲcɨt 'urine', and other words, though these historically go back to alveolar consonants, as can be seen in their cognates in
Karawari (
awkurim 'wrist' and
sɨndi 'urine'). Adjacent nasals and plosives are usually
homorganic. Other combinations such as
mt,
mk,
np,
ŋt, etc., are rare or unattested; an example is
pamki 'legs'. The same is true when plosives appear before nasals at the ends of words or syllables. In this case, the nasal is syllabic, for example
watn (a hardwood tree species). Plosives are generally voiced after nasals, with /p/ becoming voiced also before
u. At word onsets and before stressed vowels, they are aspirated and voiceless. For example:
ɲct 'urine',
pamki 'legs',
tkay 'nose',
kput 'rain'. /p/ and /w/ weaken to a voiceless fricative:
ipwa . When /k/ appears before two vowels, if the second vowel is unstressed, then the /k/ is realized as a voiced fricative:
amanakn 'mine'. Intervocally /c/ has age-based
allophony, with older speakers preferring the stop realization and younger ones the dental sibilant [s], as in
acak 'to send'. After another consonant, /c/ is always realized as a palatal stop. /ʎ/ is in free variation between and .
r varies in pronunciation between and .
Vowels The Yimas vowel inventory contains six phonemes in total, consisting of four
monophthongs and two
diphthongs: The two diphthongs in Yimas are /aj/ and /aw/. The most frequent vowels by far are /a/ and /ɨ/.
ɨ also appears as an
epenthetic vowel to break up otherwise illicit consonant clusters. In the vicinity of
u and also occasionally in other contexts, an
u is sometimes inserted instead: 'a kind of snake', 'underneath', 'two veins'. The appearance of /ɨ/ is often predictable from the surrounding consonant environment and as a result it can typically be treated as an epenthetic vowel even within lexical roots. Adopting this analysis results in whole words with no underlying vowels. The vowel phonemes are involved in numerous
phonological changes.
Syllable structure The basic structure of the Yimas word (in terms of consonants C and vowels V) is the following: :: #(C1)(C2)V1([(C3)C4(C5)]n)V2(C6)(C7)# Consonants are organized into three basic clusters in Yimas: the initial cluster [(C1)(C2)], the medial cluster [(C3)C4(C5)] and the final cluster [(C6)(C7)]. Parentheses indicate that the consonant is optional. There are specific phonological constraints placed on the cluster depending on where it is located in the word. In other words, only certain consonant phonemes can begin a word, end a word, or appear in the middle of a word. The iterative variable n allows the medial consonant cluster to be repeated many times. A Yimas word can consist of only a single vowel. An example is the verb stem /i-/, which means 'say'. Some of the longest roots are five or six syllables, like /mamantakarman/, which means 'land crab'. Yimas has predictable rules with regard to syllabification. In the middle of a word, if a consonant is between two vowels, the syllable boundary precedes the consonant: (V.CV). If two consonants are between two vowels, the syllable boundary falls between the consonants: (VC1.C2V). However, if C1 is a stop and C2 is /r/, the syllable boundary precedes C1: (V.C1C2V). Whenever three consonants are between two vowels, the syllable boundary comes after the first consonant: (VC1.C2C3V).
Stress In Yimas, the primary accent lies in general on the first syllable of a word. In words with more than three syllables, the third syllable carries secondary stress. Below are some examples (where ´ represents primary stress, and ` represents secondary stress): {{interlinear|lang=jig If the first syllable contains an epenthetic vowel but the second does not, then the second syllable is stressed. When the first as well as the second syllable contain epenthetic vowels, then the stress lies on the first syllable. Below are more examples, including words with stress on epenthetic vowels: The genitive suffix
-na, which is used on personal pronouns, takes primary stress:
ama-na-kn 'mine'. Stress is never the distinguishing factor between two words; i.e., two words cannot differ in meaning if they only differ in which syllable carries stress (as opposed to English, which distinguishes between the noun 'désert' and the verb 'desért'). ==Nouns and noun morphology==