• Webster's Revised Unabridged Dictionary
    • n Self-mettle Inborn mettle or courage; one's own temper.
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Century Dictionary and Cyclopedia
    • n self-mettle One's own fiery temper or mettle; inherent courage.
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Chambers's Twentieth Century Dictionary
    • Self-mettle (Shak.) mettle or spirit which is natural to one, and not artificially inspired
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Chambers's Twentieth Century Dictionary
A.S. self, seolf, sylf; Dut. zelf, Ger. selbe, Goth. silba.


In literature:

A full-hot horse, who being allowed his way, Self-mettle tires him.
"Beautiful Stories from Shakespeare" by E. Nesbit