godan verb (-su)
grasp back; squeeze back; grab back
Used when someone holds or squeezes your hand, and you return the grip. Often implies a mutual or reciprocal action.
彼が手を握ってきたので、私も握り返した。
He took my hand, so I grasped it back.
握手を求められ、強く
When offered a handshake, I squeezed back firmly.