Break off and Call it quits

Break off verb - To bring (as an action or operation) to an immediate end.

Call it quits and break off are semantically related In some cases you can use "Call it quits" instead a verb "Break off".

Call it quits verb - Stop doing what one is doing.

Break off and call it quits are semantically related in stop topic. You can use "Break off" instead a verb phrase "Call it quits", if it concerns topics such as stop doing something, prevent activity from going on, stop or cancel something.