RECIP'ROCATE, verb intransitive [Latin reciproco.] To act interchangeably; to alternate. One brawny smith the puffing bellows plies, and draws and blows reciprocating air. RECIP'ROCATE, verb transitive To exchange; to interchange; to give and return mutually; as, to reciprocate favors.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI