to knock on a door

to rip off; to extort (money); extortion; blackmail

to beat sb; to beat (a drum)

to sound a bell; to raise the alarm

to come to a decision; to fix on (a date etc); to determine; to finalize; to nail down (a deal etc)

to think over

(idiom) to quarrel

to do things in bits and pieces (idiom); piecemeal work