The origin of the phrase "nerves of steel" is not definitively known, but it likely emerged from the association of steel with strength, durability, and resilience. This idiom can be used metaphorically to describe people who exhibit exceptional emotional resilience and poise in personal or professional challenges that require mental strength and a cool-headed approach.

What is the origin of the idiom "make a go of something" and when to use it?

영어로 "nerves of steel"의 정의와 의미

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