reciprocate

v. 往复运动,互换,酬答

receptive, receptiveness, receptivity, receptivity, receptor, recess, recession, recessional, recessionary, recessive, recharge, rechargeable, recherche, recidivism, recidivist, recipe, recipient, recipients, reciprocal, reciprocal pronoun, reciprocally, reciprocating, reciprocating engine, reciprocation, reciprocity, recital, recitation, recitative, recite, reckless, recklessly, recklessness, reckon, reckon on, reckon with, reckoner, reckoning, reclaim, reclamation, recline, recluse,