1. courage and fortitude: a man of mettle.
2. disposition or temperament: a man of fine mettle.
3. on one's mettle, in the position of being incited to do one's best: The loss of the first round put him on his mettle to win the match.
Can be confused
medal, meddle, metal.
See more synonyms on Thesaurus.com
1. valor, pluck, vigor, ardor, nerve, fiber.
Origin: 1575-85; spelling variant of metal, in metaphoric usages
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