"fricative" in the noun sense
1. fricative consonant, fricative, spirant
a continuant consonant produced by breath moving against a narrowing of the vocal tract
"fricative" in the adjective sense
1. fricative, continuant, sibilant, spirant, strident
of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then')
Source: WordNet® (An amazing lexical database of English)
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