CHITTER

chitter, twitter

(verb) make high-pitched sounds, as of birds

Source: WordNet® 3.1

Etymology 1

Verb

chitter (third-person singular simple present chitters, present participle chittering, simple past and past participle chittered)

To make a series of high-pitched sounds; to twitter, chirp or chatter.

(obsolete, Scotland) To shiver or chatter with cold.

Etymology 2

Noun

chitter (plural chitters)

(dialect) Alternative form of chitterling

Source: Wiktionary

Chit"ter, v. i. Etym: [Cf. Chatter.]

1. To chirp in a tremulous manner, as a bird. [Obs.] Chaucer.

2. To shiver or chatter with cold. [Scot.] Burns.

Source: Webster’s Unabridged Dictionary 1913 Edition