| 单词 | reciprocate |
| 释义 | reciprocate v. 1. tr. return or requite (affection etc.). 2. intr. (foll. by with) offer or give something in return (reciprocated with an invitation to lunch). 3. tr. give and receive mutually; interchange. 4. a intr. (of a part of a machine) move backwards and forwards. b tr. cause to do this. Phrases and idioms reciprocating engine an engine using a piston or pistons moving up and down in cylinders. Derivatives reciprocation n. reciprocator n. Etymology: L reciprocare reciprocat- (as RECIPROCAL) |
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