to checkmate is a form of:

Checkmate



Same as: mate
noun
1.
ការឈ្នះដាច់, ការឈ្នះរាប
2.
(a situation in chess in which the capture of a king cannot be prevented, a complete defeat. [interjection] Chess a call indicating checkmate. -mated, -mating to subject to checkmate) ឈ្នះដាច់, ឈ្នះរាប
ENGLISH MEANING
noun
1.
The position in the game of chess when a king is in check and cannot be released, -- which ends the game.
2.
A complete check; utter defeat or overthrow.
verb
1.
(TRANSITIVE) To check (an adversary's king) in such a manner that escape in impossible; to defeat (an adversary) by putting his king in check from which there is no escape.
2.
(TRANSITIVE) To defeat completely; to terminate; to thwart.