godan verb (-ru), intransitive verb
chirp; twitter; sing (of small birds)
Describes the light, high-pitched vocalizations of small birds. Can also be used metaphorically for people chattering or gossiping in a lively, bird-like manner.
朝、庭で小鳥がさえずっている。
In the morning, small birds are chirping in the garden.
彼女たちは楽しそうにさえずっている。
They are chattering happily like birds.