'Reciprocate' definitions:

Definition of 'reciprocate'

From: WordNet
verb
Act, feel, or give mutually or in return; "We always invite the neighbors and they never reciprocate!"
verb
Alternate the direction of motion of; "the engine reciprocates the propeller"

Definition of 'Reciprocate'

From: GCIDE
  • Reciprocate \Re*cip"ro*cate\ (r[-e]*s[i^]p"r[-o]*k[=a]t), v. i. [imp. & p. p. Reciprocated (r[-e]*s[i^]p"r[-o]*k[=a]`t[e^]d); p. pr. & vb. n. Reciprocating.] [L. reciprocatus, p. p. of reciprocare. See Reciprocal.] To move forward and backward alternately; to recur in vicissitude; to act interchangeably; to alternate. [1913 Webster]
  • One brawny smith the puffing bellows plies, And draws and blows reciprocating air. --Dryden. [1913 Webster]
  • Reciprocating engine, a steam, air, or gas engine, etc., in which the piston moves back and forth; -- in distinction from a rotary engine, in which the piston travels continuously in one direction in a circular path.
  • Reciprocating motion (Mech.), motion alternately backward and forward, or up and down, as of a piston rod. [1913 Webster]

Definition of 'Reciprocate'

From: GCIDE
  • Reciprocate \Re*cip"ro*cate\, v. t. To give and return mutually; to make return for; to give in return; to interchange; to alternate; as, to reciprocate favors. --Cowper. [1913 Webster]

Synonyms of 'reciprocate'

From: Moby Thesaurus