TITTERED
Verb
tittered
simple past tense and past participle of titter
Source: Wiktionary
TITTER
Tit"ter, v. t. [imp. & p. p. Tittered; p. pr. & vb. n. Tittering.]
Etym: [Probably of imitative origin.]
Definition: To laugh with the tongue striking against the root of the upper
teeth; to laugh with restraint, or without much noise; to giggle.
A group of tittering pages ran before. Longfellow.
Tit"ter, n.
Definition: A restrained laugh. "There was a titter of . . . delight on his
countenance." Coleridge.
Tit"ter, v. i.
Definition: To seesaw. See Teeter.
Source: Webster’s Unabridged Dictionary 1913 Edition