Bible Dictionaries
Sibilate

Webster's Dictionary

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

Bibliography Information
Webster, Noah. Entry for 'Sibilate'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/sibilate.html. 1828.