Kyrgyz vowel space is different in affixes and stems.Washington (2007) describes the former as more typical and more condensed.[2]
In stem vowel space, the main difference between/e/ and/i/ is that the latter is more back. In affix vowel space, they can have the same backness, and differ by height.[2]
/a/ appears only in borrowings from Persian and is excluded from normal vowel harmony rules. In most dialects, its status as a vowel distinct from/ɑ/ is questionable. There is also a phonetic[a] which appears as a result of regressive assimilation of/ɑ/ before syllables with phonological front vowels, e.g.aydöş[àjd̪ø̞ʃ] 'sloping'.[3][4]
/i,y,u,e,ø,o/ are sometimes transcribed/ɪ,ʏ,ʊ,ɛ,œ,ɔ/.[5]
The sequence of any vowel and the consonant/z/ is pronounced as a long vowel with falling pitch.[6]
In colloquial speech, word-final vowels are dropped when the next word begins with a vowel.[7]
All vowels but/i/ may be both short and long. Long vowels are the result of historical elisions (e.g.compensatory lengthening) and contractions. For example,caa 'rain' < *yağ;bee 'mare' (cf. Kazakhbie);too 'mountain' < *tağ;döölöt 'wealth' < Arabicdawlat;uluu 'great' < *uluğ;elüü 'fifty' < *ellig.
In loanwords from Persian and Arabic, palatal[c,ɟ] are always followed by front vowels, whereas velar[k,ɡ] are always followed by back vowels, regardless of the vowel harmony.[9]
Word-final and word-initial/k/ is voiced to[ɡ] when it is surrounded by vowels or the consonants/m,n,ŋ,l,r,j/.[7]
In Kyrgyz, suffixes beginning with/n/ show desonorisation of/n/ to[d] after consonants (including/j/), and devoicing to[t] after voiceless consonants; e.g. the definite accusative suffix -NI patterns like this:kemeñi ('the boat'),aydı ('the month'),tordu ('the net'),koldu ('the hand'),tañdı ('the dawn'),közdü ('the eye'),baştı ('the head').
Suffixes beginning with/l/ also show desonorisation and devoicing, though only after consonants of equal or lower sonority than/l/, e.g. the plural suffix -LAr patterns like this:kemeler ('boats'),aylar ('months'),torlor ('nets'),koldor ('hands'),tañdar ('dawns'),közdör ('eyes'),baştar ('heads'). Other/l/-initial suffixes, such as -LA, a denominal verbal suffix, and -LÚ, a denominal adjectival suffix, may surface either with/l/ or/d/ after/r/; e.g.tordo-/torlo- ('to net/weave'),türdüü/türlüü ('various').
Kirchner, Mark (1998), "21 Kirghiz", in Johanson, Lars; Csató, Eva Á. (eds.),The Turkic Languages, Taylor & Francis, pp. 344–356,ISBN978-0415412612
Linebaugh, Gary Dean (2007), "5.2.1.1 Tatar, Kyrgyz, and Yakut",Phonetic Grounding and Phonology: Vowel Backness Harmony and Vowel Height Harmony,ProQuest, pp. 121–123,ISBN978-0549340874