| sibilant | (adjective) of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then') | Synonyms: continuant, fricative, spirant, strident |
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| (noun) a consonant characterized by a hissing sound (like s or sh) | Synonyms: sibilant consonant |
| sibilate | (verb) make a sharp hissing sound, as if to show disapproval | Synonyms: hiss, siss, sizz |
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| (verb) express or utter with a hiss | Synonyms: hiss, siss, sizz |
| (verb) utter a sibilant | - |
| (verb) pronounce with an initial sibilant | - |
| sibilation | (noun) pronunciation with a sibilant (hissing or whistling) sound | Synonyms: assibilation |
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| (noun) a fricative sound (especially as an expression of disapproval) | Synonyms: fizzle, hiss, hissing, hushing |