a phonological rule in some languages, as Hungarian and Turkish, requiring that the vowels of a word all share a specified feature, such as front or back articulation, thereby conditioning the form that affixes may take, as in forming the Turkish plurals evler “houses” from ev “house” and adamlar “men” from adam “man.”
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use vowel harmony in a sentence
Vowel-harmony and weakening of consonants occur as in Finnish.
Vowel-harmony is observed (vrok, “I await,” but verek, “I strike”).