to return something that you have borrowed
GIVE BACK
to answer a question in a rude way, usually because you are angry or don't respect someone
ANSWER BACK
to return money that you have borrowed
PAY BACK
to look behind you, either in time or physically
LOOK BACK
to call someone who called you before (usually if you have missed their call)
CALL BACK
to respond to a message
WRITE BACK
to reduce a program or use of something (often used to describe money spent on a project)
CUT BACK
to return to the place where you were before, or to return to an earlier point in a conversation (common in meetings)
GO BACK
to return somewhere quickly
HURRY BACK