EPENTHESIS
- the insertion of a phoneme, letter, or syllable into a word, usually to satisfy the phonological constraints of a language or poetic context [n EPENTHESES] : EPENTHETIC [adj]
- the insertion of an extra sound into a word, eg fillum for film [n EPENTHESES]
- The insertion of a sound or letter within a word, e.g., the b in thimble