Answer: HUMS
AnswerCrossword Clue
HUMSWhat idle amp does
HUMSIs full of activity: Colloq.
HUMSSings in a certain way.
HUMSInsect sounds.
HUMSIs full of activity.
HUMSSounds of a kind
HUMSBee sounds
HUMSInsect noises
HUMSBombinates
HUMSAccompanies musically sans words
HUMSSymptoms for a car mechanic
HUMSKeeps one's mouth shut?
HUMSOperates perfectly
HUMSAmbient sounds
HUMSObviously doesn't know the words
HUMSFactory noises.
HUMSSings wordlessly
HUMSPerforms musically sans words
HUMSClose-mouthed singing
HUMSSings with a closed mouth
HUMSRuns well, as an engine
HUMSDoesn't quite sing
HUMSBuzzes along
HUMSRuns perfectly
humsto make a low droning sound
humsHUM, to make a sound like bees
humsthe act or sound of humming
humsto sing with closed lips
humsto be busy or active
HUMSBuzzes
HUMSBustles
HUMSRuns smoothly
HUMSSings without words
HUMSDrones
HUMSIs abuzz
HUMSForgets the words, maybe
HUMSIndistinct sounds of mingled voices
HUMSPurrs
HUMSPlays a kazoo, basically
HUMSSong sounds