reciprocating

verb (used with object), re·cip·ro·cat·ed, re·cip·ro·cat·ing.

1. to give, feel, etc., in return.
2. to give and receive reciprocally; interchange: to reciprocate favors.
3. to cause to move alternately backward and forward.

verb (used without object), re·cip·ro·cat·ed, re·cip·ro·cat·ing.

4. to make a return, as for something given.
5. to make interchange.
6. to be correspondent.
7. to move alternately backward and forward.

verb

1. to give or feel in return
2. to move or cause to move backwards and forwards
3. (intr) to be correspondent or equivalent

adj.

“moving back and forth,” 1690s, present participle adjective from reciprocate (v.). Specifically of machines by 1822.

v.

“to return, requite,” 1610s, back-formation from reciprocation, or else from Latin reciprocatus, past participle of reciprocare “rise and fall, move back and forth; reverse the motion of,” from reciprocus (see reciprocal). Related: Reciprocated; reciprocating.