usage: engage in sexual intercourse; "Birds mate in the Spring"
2. match, mate, couple, pair, twin, join, bring together
usage: bring two objects, ideas, or people together; "This fact is coupled to the other one"; "Matchmaker, can you match my daughter with a nice young man?"; "The student was paired with a partner for collaboration on the project"
usage: place an opponent's king under an attack from which it cannot escape and thus ending the game; "Kasparov checkmated his opponent after only a few moves"