Editing Vowel harmony (section)

===Syllabic synharmony===
Syllabic synharmony was a process in the [[Proto-Slavic language]] ancestral to all modern [[Slavic languages]]. It refers to the tendency of frontness (palatality) to be generalised across an entire syllable. It was therefore a form of consonant–vowel harmony in which the property 'palatal' or 'non-palatal' applied to an entire syllable at once rather than to each sound individually.

The result was that back vowels were fronted after ''j'' or a palatal consonant, and consonants were palatalised before ''j'' or a front vowel. Diphthongs were harmonized as well, although they were soon monophthongized because of a tendency to end syllables with a vowel (syllables were or became open). This rule remained in place for a long time, and ensured that a syllable containing a front vowel always began with a palatal consonant, and a syllable containing ''j'' was always preceded by a palatal consonant and followed by a front vowel.

A similar process occurs in [[Skolt Sami language|Skolt Sami]], where palatalization of consonants and fronting of vowels is a [[Skolt Sami language#Suprasegmentals|suprasegmental]] process applying to a whole syllable. Suprasegmental palatalization is marked with the letter ''ʹ'', which is a [[Modifier letter prime]], for example in the word ''vääʹrr'' 'mountain, hill'.