epenthesize

[ uh-pen-thuh-sahyz ]
/ əˈpɛn θəˌsaɪz /

verb (used with object), ep·en·the·sized, ep·en·the·siz·ing.

to insert as an epenthetic sound.
Also especially British, ep·en·the·sise.

Origin of epenthesize

First recorded in 1875–80; epenthes(is) + -ize