UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈmɛtəl/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈmɛtəl/ ,USA pronunciation: respelling(met′l)

WordReference Random House Learner's Dictionary of American English © 2020
met•tle /ˈmɛtəl/USA pronunciation   n. [uncountable]
  1. courage or willingness to do a task:a man of mettle.
  2. disposition or temperament:of fine mettle.

WordReference Random House Unabridged Dictionary of American English © 2020
met•tle  (met′l),USA pronunciation n. 
  1. courage and fortitude:a man of mettle.
  2. disposition or temperament:a man of fine mettle.
  3. Idiomson one's mettle, in the position of being incited to do one's bestThe loss of the first round put him on his mettle to win the match.
  • spelling, spelled variant of metal, in metaphoric usages 1575–85
    • 1.See corresponding entry in Unabridged . valor, pluck, vigor, ardor, nerve, fiber.

Collins Concise English Dictionary © HarperCollins Publishers::
mettle /ˈmɛtəl/ n
  1. courage; spirit
  2. inherent character
  3. on one's mettleroused to putting forth one's best efforts
Etymology: 16th Century: originally variant spelling of metal
'mettle' also found in these entries (note: many are not synonyms or translations):
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