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tour de force [toor duh fawrs, -fohrs; Fr. toor duh fawrs]
noun, plural tours de force [toorz duh fawrs, -fohrs; Fr. toor duh fawrs]
an exceptional achievement by an artist, author, or the like, that is unlikely to be equaled by that person or anyone else; stroke of genius.
a particularly adroit maneuver or technique in handling a difficult situation.