warble
verb- [transitive, intransitive] warble (something) | + speech (humorous)
to sing, especially in a high voice that is not very steady (尤指用颤音高声)唱 - [intransitive, transitive] warble (something)
(of a bird )鸟 to sing with rapidly changing notes 啭鸣
Word Originlate Middle English (as a noun in the sense ‘melody’): from Old Northern French werble (noun), werbler (verb), of Germanic origin; related to whirl.