reciprocate

verb4

1. •
   To give something else in response (where the "thing" may also be abstract, a feeling or action) To make a reciprocal gift.

   • I gave them apples from my tree; they reciprocated with a pie and some apple jelly.
   • I simply couldn't accept such a gift without reciprocating.
2. •
   To counter, retort or retaliate.
3. •
   To move backwards and forwards, like a piston.

   • One brawny smith the puffing bellows plies, / And draws and blows reciprocating air. — 1697
4. •
   To exchange two things, with both parties giving one thing and taking another thing.

   • The USTR isn't reciprocating actual tariffs. It's just placing the biggest tariffs on the countries running the biggest trade surpluses. — 2025