Answer: hummed

AnswerCrossword Clue
HUMMEDDroned
HUMMEDBuzzed
HUMMEDShowed busyness
HUMMEDMade a perfect engine sound
HUMMEDForgot the words?
HUMMEDSing with closed lips
HUMMEDSang along when you forgot the words
HUMMEDMade music on a comb
hummedto make a low droning sound
hummedHUM, to make a sound like bees
hummedto sing with closed lips
hummedthe act or sound of humming
hummedto be busy or active