war·ble 
/ˈwoɚbəl/ verb
war·bles; war·bled; war·bling /ˈwoɚbəl/ verb 1 [no obj] of a bird : to sing a song that has many different notes
▪ Birds were warbling in the trees. 2 [+ obj] humorous : to sing (something) especially with a high or shaky voice
▪ warble a tune ▪ He warbled his way through the song.
▪ Birds were warbling in the trees.
▪ warble a tune ▪ He warbled his way through the song.
— warble noun, plural warbles [count]
▪ a canary's warble
▪ a canary's warble
