noun / verb
chirrup
CHEER-up/ˈtʃɪrəp/
A short, cheerful birdlike sound, or to make such a sound.
The robin gives a cheerful chirrup from the budding branch.

Etymology
Chirrup is a variant of chirp, describing a short, sharp, happy birdlike sound. Chirp may imitate the sound directly, or it may continue an older verb meaning “to twitter.”
More examples
- Several birds chirrup in the hedge.
- He chirruped softly to encourage the horse.
- A lively chirrup breaks the morning silence.
Forms
chirrup · chirrups · chirruped · chirruping
Similar words
- chirp
- Chirp is a close equivalent; chirrup often suggests a more trilling or repeated sound.