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wear

摩耗　—　Measuring

The slow loss of metal as a coin passes from hand to hand.

Sestertius of Hadrian Sestertius of Hadrian117–138 Crown of William III Crown of William III1696 Bank of Chosen One Yen Note Bank of Chosen One Yen Note1932
A photograph of what this word names.

A worn coin does not contain the amount of metal corresponding to its face value. If it still circulates at face value, the difference becomes someone's loss.

⚠ The weight of an excavated coin should not be taken as its official standard at the time of issue. It is lighter due to wear.