母音調和
Vowel harmony is lost in Estonian, Livonian and partly Veps, but not South Estonian or Votic. For example, Proto-Finnic "*külä" "village" &gt; Estonian "küla" and Livonian "kilā", but &gt; Finnish "kylä", Veps "külä", Votic "tšülä", Võro "külä". In Finnish and Karelian, vowel harmony was retained and extended to "*o" as well, creating a new vowel "*ö" in words with front vowel harmony.