Other forms: chittering
To chitter is to make a rapid high chattering sound. Squirrels chitter, chittering in the trees, a chittering noise.
It belongs to small animals and to teeth in the cold, and in Scots it is the ordinary word for teeth chattering. The sound of the word imitates the sound it names.
1verbchitterTo make a rapid high chattering sound.
“Squirrels chittered angrily at the cat from high in the oak tree.”
chitter is a sounding.
Middle English chiteren imitates the sound, and is related to chatter.
Middle English
chiteren
English, today
chitter
From Middle English chiteren, chitren, cheteren. Ultimately imitative of the sound; compare didder and teeter as well as German zittern.
Etymology from Wiktionary, CC BY-SA
Practised in A Song of Ice and Fire