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1. Of speech sounds produced by forcing air through a constricted passage (as 'f', 's', 'z', or 'th' in both 'thin' and 'then')
   - continuant, sibilant, spirant, strident

1. A continuant consonant produced by breath moving against a narrowing of the vocal tract
   - fricative consonant, spirant

Derived forms: fricatives

See also: soft

Type of: continuant, continuant consonant

Encyclopedia: Fricative