Mate

the officer below the master on a commercial ship

a fellow member of a team

the partner of an animal (especially a sexual partner)

a person's partner in marriage

an exact duplicate

one of a pair

South American holly

informal term for a friend of the same sex

South American tea-like drink made from leaves of a South American holly called mate

a chess move constituting an inescapable and indefensible attack on the opponent's king

engage in sexual intercourse

bring two objects, ideas, or people together

place an opponent's king under an attack from which it cannot escape and thus ending the game