reciprocative

• 过时形容词，指作为回应而给予或做出的；与相互交换有关的。在现代英语中很少使用，已在很大程度上被“reciprocal”取代。

An obsolete adjective meaning given or done in return; relating to mutual exchange. It is rarely used in modern English, having been largely replaced by 'reciprocal'.

1. Mutual or given in returnC1formal

   Involving an exchange of actions, feelings, or obligations between two or more parties; given or done in return.

   相互的

   • Their relationship was built on reciprocative trust and support.
   • The treaty established a reciprocative agreement for trade benefits.
   • She appreciated his reciprocative kindness after she helped him.

   同义词complementarycorrespondinginterchangeablemutualreciprocalshared

   反义词one-sidedunidirectionalunreciprocated

2. Alternating motionC2formal

   Moving alternately backward and forward, like a pendulum or a piston.

   往复运动

   • The engine's reciprocative motion converts linear movement into rotational energy.
   • The saw uses a reciprocative blade to cut through the wood.
   • The machine's reciprocative action was smooth and efficient.

   同义词alternatingback and forthoscillatingto and fro