Author(s): Mediha MANGIR
Sound harmonies which are one of the most significant features of Turkish is often regarded as the rules sorting vowels and consonants in a word. There are two types of harmony amongst the vowels in Turkish: the harmony amongst the vowels uttered as back and front according to the language situation is called as major vowel harmony / back-front harmony/palatal harmony. The harmony amongst the vowels uttered flat and rounded according to the position of lips is called as minor vowel harmony/flatnessroundness harmony/ labial harmony. Labial harmony when compared with palatal harmony has emerged and become popular in the later periods of Turkish. Labial harmony which was popular in old Turkish period has stopped its development in old Anatolian Turkish and even showed regression.