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epenthesize

American  
[uh-pen-thuh-sahyz] / əˈpɛn θəˌsaɪz /
especially British, epenthesise

verb (used with object)

epenthesized, epenthesizing
  1. to insert as an epenthetic sound.


Etymology

Origin of epenthesize

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