prove one's mettle
Definition of prove one's mettle
: to prove how tough one is He proved his mettle as a fighter tonight.
Explore M-W
Word by Word Definitions
proveplay
: to learn or find out by experience
: to test the truth, validity, or genuineness of
: to test the worth or quality of
See the full definition of prove
mettleplay
: vigor and strength of spirit or temperament (see temperament 1a)
: staying quality : stamina
: quality of temperament or disposition
See the full definition of mettle
Seen and Heard
What made you want to look up prove one's mettle? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!