Syllable
Definition A syllable is a unit of sound composed of a central peak of sonority (usually a vowel), and the consonants that cluster around this central peak
Discussion Syllable structure, which is the combination of allowable segments and typical sound sequences, is language specific.
OptionalityDescriptionParts OptionalInitial segment of a syllable Onset ObligatoryCentral segment of a syllable Nucleus OptionalClosing segment of a syllable Coda
Example (English)
1 What we might call a minimum syllable would be a single vowel in isolation, e.g., the words
2 Some syllables have an onset (that is, they have more than just silence preceding the centre of the syllable):
3 Syllables may have no onset but have a coda:
4 Some syllables have onset and coda: