spirant

1. The question of spirant and the development are also recommended, and then the improved method is discussed.
   针对橡胶轴承存在的鸣音问题，介绍了改进研究的进展，提出改进方法。

noun

1. a continuant consonant produced by breath moving against a narrowing of the vocal tract

   Synonym:    fricative consonantfricative

adj

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

   Synonym:    fricativecontinuantsibilantstrident