mating

the act of pairing a male and female for reproductive purposes

the casual couplings of adolescents

engage in sexual intercourse

Birds mate in the Spring

bring two objects, ideas, or people together

This fact is coupled to the other one

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

twist together or entwine into a confusing mass

The child entangled the cord