warble

a lumpy abscess under the hide of domestic mammals caused by larvae of a botfly or warble fly

A small, hard tumor which is produced on the back of a horse by the heat or pressure of the saddle in traveling.

A quavering modulation of the voice; a musical trill; a song.

sing or play with trills, alternating with the half note above or below

sing by changing register; sing by yodeling

To sing in a trilling, quavering, or vibratory manner; to modulate with turns or variations; to trill; as, certain birds are remarkable for warbling their songs.

To be quavered or modulated; to be uttered melodiously.