a : vigor and strength of spirit or temperament
b : staying quality : stamina <equipment that proved its mettle>
: quality of temperament or disposition <gentlemen of brave mettle — Shakespeare>
— met·tled \-təld\ adjective
— on one's mettle
: aroused to do one's best
Examples of METTLE
- The competition will test her mettle.
Origin of METTLE
alteration of metal
First Known Use: 1581
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