名詞 spirant:

1. a continuant consonant produced by breath moving against a narrowing of the vocal tract
   同義詞：fricative consonant, fricative

形容詞 spirant:

1. of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then')
   同義詞：fricative, continuant, sibilant, strident