D defs.my
Entry 1 sense Webster, 1913

Sibilate

· Sib·i·late · IPA
01 v. t. & i. To pronounce with a hissing sound, like that of the letter s; to mark with a character indicating such pronunciation.
  1. 1.
    To pronounce with a hissing sound, like that of the letter s; to mark with a character indicating such pronunciation.