To counter, retort or retaliate.
To move backwards and forwards, like a piston.
To exchange two things, with both parties giving one thing and taking another thing.
To give something else in response (where the "thing" may also be abstract, a feeling or action) To make a reciprocal gift.
To script again or anew.
A rewriting, a document copied or written again.
A duplicate copy of a legal document.
A clarification of a point of law by a monarch issued upon formal consultation by a lower magistrate.
An ad hoc reply of a pope to some specific question of canon law or morality, without precedential force, sometimes (improper) inclusive of decretals which serve as precedents in canon law.