METTLES
Noun
mettles
plural of mettle
Anagrams
• meltest, stemlet
Source: Wiktionary
METTLE
Met"tle, n. Etym: [E. metal, used in a tropical sense in allusion to
the temper of the metal of a sword blade. See Metal.]
Definition: Substance or quality of temperament; spirit, esp. as regards
honor, courage, fortitude, ardor, etc.; disposition; -- usually in a
good sense.
A certain critical hour which shall... try what mettle his heart is
made of. South.
Gentlemen of brave mettle. Shak.
The winged courser, like a generous horse, Shows most true mettle
when you check his course. Pope.
To put one one's mettle, to cause or incite one to use one's best
efforts.
Source: Webster’s Unabridged Dictionary 1913 Edition