(v. t. & i.) To pronounce with a hissing sound, like that of the letter s\; to mark with a character indicating such pronunciation.

assibilate bark bawl bellow blare blat blubber boom bray breathe buzz cackle chant chirp coo crow drawl effervesce exclaim fizz fizzle flute gasp growl grunt hiss hush keen lilt lisp mumble murmur mutter pant pipe roar rumble scream screech shriek shush sigh sing siss sizz sizzle snap snarl sneeze sniff sniffle snore snort snuff snuffle sob spit splutter sputter squall squash squawk squeal squelch squish swish thunder trumpet twang wail warble wheeze whine whish whisk whisper whistle whiz whoosh yap yawp yell yelp zip