war ‧ ble /ˈwɔːb ə l $ ˈwɔːr-/ BrE AmE verb
[ Date: 1300-1400 ; Language: Old North French ; Origin: werbler ]
1 . [intransitive] to sing with a high continuous but quickly changing sound, the way a bird does
2 . [intransitive and transitive] to sing, especially not very well – used humorously:
Mills warbled a few notes.
—warble noun [countable]