Coda

From Teflpedia

A coda (/ˈkəʊ.də/) is a final consonant sound within a syllable.

Syllables that possess codas are closed syllables, whereas those that lack codas are open syllables. English uses both closed and open syllables. For example, in the monosyllabic word mad /ˈmæd/ the only syllable's coda is /d/.