SIBILATE
hiss, siss, sizz, sibilate
(verb) make a sharp hissing sound, as if to show disapproval
hiss, sizz, siss, sibilate
(verb) express or utter with a hiss
sibilate
(verb) utter a sibilant
sibilate
(verb) pronounce with an initial sibilant
Source: WordNet® 3.1
Etymology
Verb
sibilate (third-person singular simple present sibilates, present participle sibilating, simple past and past participle sibilated)
To hiss.
To speak with a hissing sound.
Anagrams
• albitise, tibiales
Source: Wiktionary
Sib"i*late, v. t. & i.
Definition: To pronounce with a hissing sound, like that of the letter s;
to mark with a character indicating such pronunciation.
Source: Webster’s Unabridged Dictionary 1913 Edition