1. Assibilate: 1 v insert a sibilant sound before or after (another sound) Type of: sibilate utter a sibilant v change into a sibilant Type of: change undergo a change; …

2. Sibilate: 1 v make a sharp hissing sound, as if to show disapproval Synonyms: hiss , siss , sizz Type of: emit , let loose , let out , utter express audibly; utter sounds (not necessarily words) v utter a sibilant Types: Assibilate insert a sibilant sound before or after (another sound) Type of: emit , let loose , …