Account For:(transitive) To explain by relating circumstances; to show that some one, thing or members of a group are present or have been processed.
I don't have to account for anything to you.
Act out :To perform a role or behavior
The students acted out a scene from the play.
Act up : To behave inappropriately or malfunction
The computer started to act up and froze.
Arm in arm :With arms linked together; with arms around each other's shoulder or waist. (of two or more people)
Synonyms: arm in crook
Husband and wife were walking arm in arm on the road.
Ask for :To request or invite someone to do something .
I'm going to ask for help with this difficult task.
Ask out : ask Someone to go on a date