return the favor

:  to go back or come back again

:  to go back in thought, practice, or condition :  revert

:  to pass back to an earlier possessor

:  the act of coming back to or from a place or condition

:  a regular or frequent returning :  recurrence

:  the delivery of a legal order (such as a writ) to the proper officer or court

:  having or formed by a change of direction

:  doubled on itself

:  played, delivered, or given in return

:  friendly regard shown toward another especially by a superior

:  approving consideration or attention :  approbation

:  partiality

:  to regard or treat with favor

:  to do a kindness for :  oblige

:  endow