sibilate

To utter or pronounce with a hissing sound.

To pronounce with a hissing sound, like that of the letters s or z; also, to mark with a character indicating such a pronunciation.

To pronounce with a hissing sound, like that of the letter s; to mark with a character indicating such pronunciation.

To hiss

To speak with a hissing sound

make a sharp hissing sound, as if to show disapproval

pronounce with an initial sibilant

express or utter with a hiss

utter a sibilant