An Etymological Dictionary of Astronomy and Astrophysics

A game or contest in which two or more contestants or teams oppose each other (Dictionary.com).

Etymology (EN): Originally “one of a pair, an equal;” O.E mæcca, “companion, mate, one of a pair, wife, husband, an equal,” from gemæcca; cf. O.S. gimaco “fellow, equal,” O.H.G. gimah “comfort, ease,” M.H.G. gemach “comfortable, quiet,” Ger. gemach “easy, leisurely.”

Etymology (PE): Kâd, from Mid.Pers. kâdag “game,” Sogd. kâtak “game, play;” cf. Kurd. (Sorani) kâya “game,” Zazaki kây, Abyâneyi, Anâraki, Nâini kâye, Qohrudi kâda, Shamerzâdi ke, Zefrehi kê “game, play;” Av. kā- “to take pleasure, desire;” Skt. kā- “to desire, wish.”