Expert as in insensitive Extremely tough or unyielding, often used to describe a person who is unemotional or difficult to disturb. Clear All
2 Example Sentences Showcasing the Meaning of 'Hard As Nails'
The scientist was hard as nails, dedicating long hours to meticulous research without a hint of weariness.
The software engineer had to be hard as nails to meet tight deadlines and solve complex coding challenges.
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