trump

A suit in card games that outranks all other suits for the duration of a hand.

A card of such a suit.

A trump card.

A key resource to be used at an opportune moment.

A reliable or admirable person.

To take (a card or trick) with a trump.

To get the better of (an adversary or competitor, for example) by using a crucial, often hidden resource.

To play a trump.

To devise fraudulently.