Wednesday Word: Sibilant

sibilant |ˈsibələnt|adjective Phonetics(of a speech sound) sounded with a hissing effect, for example s, sh.• making or characterized by a hissing sound : hissibilant whisper.noun Phoneticsa sibilant speech sound.DERIVATIVESsibilance nounORIGIN mid 17th cent.: from Latin sibilant-‘hissing,’ from the verb sibilare.

The most fitting illustration of this word I can think of is the scene from the Harry Potter and the Chamber of Secrets when he talks to the snake.