Answer:

knocks

Answer	Crossword Clue
KNOCKS	Pounding sounds
KNOCKS	Rappers' sounds
KNOCKS	Raps

KNOCKS	Dumps on
KNOCKS	Eschews ringing the bell
KNOCKS	Raps on the door
KNOCKS	Bad-mouths
KNOCKS	Skips the doorbell
KNOCKS	Worrisome engine sounds
KNOCKS	Criticizes
KNOCKS	Signals one's arrival, perhaps

KNOCKS	Seeks an opening?
KNOCKS	Disparages
KNOCKS	Negative criticisms
KNOCKS	Eschews the bell