tittering
adjective
[ ˈtɪt(ə)rɪŋ ]
• expressing or characterized by half-suppressed laughter or amusement.
• "the tittering onlookers were stunned into silence"
titter
verb
• give a short, half-suppressed laugh; giggle.
• "her stutter caused the children to titter"
Origin:
early 17th century: imitative.
