IdiomDaily LifeRussian

козырная карта (kozyrnaya karta)

Meaning: A decisive advantage or secret resource held in reserve.

Literally: Trump card

Example: “Её японский стал козырной картой на собеседовании.” — Her Japanese was the trump card in the interview.

English equivalent: A trump card

Equivalents in other languages

Origin: In card games a trump (козырь) outranks every other suit, so a trump card held back can win a hand at the last moment. Figuratively, it is the decisive argument or advantage one keeps in reserve. English and other European languages use the same image.

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