reciprocate
/rɪˈsɪprəkeɪt/verb
1
- with obj. respond to (a gesture or action) by making a corresponding one互给; 互换, 交换（手势, 动作）：
the favour was reciprocated
互相帮忙
no obj. perhaps I was expected to reciprocate with some remark of my own.或许我也该说上几句。
1.1
- experience the same (love, liking, or affection) for someone that has such feelings for oneself回报, 报答; 酬答（爱, 喜爱, 感情）：
her passion for him was not reciprocated.
她对他的热情没有得到回报。
2
- no obj. [usu. as adj. reciprocating](of a part of a machine) move backwards and forwards in a straight line（机件）往复运动：
a reciprocating blade.
往复运动的刀刃。
派生词
reciprocation
nounreciprocator
noun词源
late 16th cent.: from Latin reciprocat- 'moved backwards and forwards', from the verb reciprocare, from reciprocus （see RECIPROCAL）.