IPA: /ɪˈpɛnθəsɪs/
KK: /ɛˈpɛnθəsɪs/
The addition of a sound or letter within a word, often to make pronunciation easier or to fit certain linguistic rules.
In linguistics, epenthesis can occur when a vowel is added to break up a difficult consonant cluster.
Epenthesis → It is formed from "ep-" (meaning upon or in addition) and "enthesis" (from Greek "enthesis", meaning to place or put in). The word refers to the addition of a sound or letter within a word, effectively placing something extra within it.
Think of adding something 'upon' ('ep-') a word by 'placing' ('enthesis') a sound or letter inside it — that's what epenthesis means.