Verbs

(v)singdeliver by singing“Sing Christmas carols”
(v)singproduce tones with the voice“She was singing while she was cooking”, “My brother sings very well”
(v)singto make melodious sounds“The nightingale was singing”
(v)whistle, singmake a whining, ringing, or whistling sound“the kettle was singing”, “the bullet sang past his ear”
(v)spill the beans, let the cat out of the bag, talk, tattle, blab, peach, babble, sing, babble out, blab outdivulge confidential information or secrets“Be careful — his secretary talks”