sibilant

/ˈsɪbɪlənt/
adjective
  1. Making or having a hissing sound, like the letters s, z, sh, or zh.
    • Her sibilant whisper was barely audible across the room.
    • The snake made a soft sibilant noise as it moved through the grass.
    • The old radiator emitted a sibilant hiss of steam.
Synonyms
noun
  1. A speech sound that is made by forcing air through a narrow channel, such as /s/, /z/, /ʃ/, or /ʒ/.
    • When learning pronunciation, students practice distinguishing between different sibilants.
    • The poet used many sibilants to create a soft, flowing rhythm.
    • In English, the letter 's' is a common sibilant.
What does "sibilant" mean? | whatsthatwordmean | whatsthatwordmean