Knašta/Third I
The term Third I (Drý-ins Í /dri ɪns i/ in Knašta) is used to describe the realization of the vowel í after ts and at the end of some words. It is called the Third I because the other two phonemes involving an "I-like" vowel (discounting dipthongs) are i /ɪ/ and í /i/.
Location of Third I in Words
The Third I is always written as í, and never as ý, which normally represent the same phoneme (tsí is pronounced /t͡si₃/, while tsý is pronounced /t͡si/). Any í occurring after ts is automatically pronounced as the Third I. An í occurring at the end of the word (including the end of the word before affixes are applied) is also typically pronounced as the Third I.
Examples
Third I's are bolded.
Tsíentsí /t͡si₃ɛnt͡si₃/ (science)
Kapítůlatsíàtsjon /kapitulat͡si₃atsjon/ (surrender)
Agaňí /agaɲi₃/ (again)
Vošní /vɑʃni₃/ (you, singular)
Vrémenskí /vremɛnski₃/ (real)
Vrémenskí-las /vremɛnski₃las/ (really)
Realizations of the Third I
The standard pronunciation of the Third I is [e̞], however, it can also be realized as [ɛi̯], [ei̯], and at the end of words [aɪ̯]. These diphthongs are typically seen as having arisen from [e̞].
If the Third I does not occur at the end of the word, it may also be realized as a schwa ([ə]).
Example: Vrémenskí-las /vremɛnskəlas/