chī​chī

chuckle

吃吃 chī​chī
chuckle descriptive
the sound of muffled or suppressed laughter, such as giggling or tittering

Hearing this, she couldn't help but giggle.

stammer descriptive
the sound or manner of speaking with a stutter or hesitation

He has a bit of a stutter and often struggles to speak for a while.

Frequency

Written text
4.92 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)