13 letters · 19 points in Scrabble
noun the act of making or doing something in return
noun alternating back-and-forth movement
noun mutual interaction; the activity of reciprocating or exchanging (especially information)
originEtymology tree English reciprocate Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation English -ion English reciprocation From reciprocate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0