How to Say "mettle" in Spanish
The Spanish word for “mettle” is “acero” — C1 level.
English → SpanishC1
nounC1formal
courage and determination

Examples
Tuvo que demostrar su acero frente a las críticas de la prensa.
He had to show his mettle (strength/resilience) in the face of press criticism.
Mantenía una mirada de acero, sin mostrar miedo.
She maintained a steely gaze, without showing fear.
Figurative Use
When used figuratively, 'acero' often appears after the preposition 'de' (of) to describe a quality: 'una persona de acero' (a person of steel/a very tough person).
Related Translations
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