wear and tear
noun [ U ]
INSURANCE ukusthe damage that happens to an object in ordinary use during a period of time:
The insurer will reduce any payout to take into account wear and tear of the item.
general/normal wear and tear The airline will not accept liability for minor damage to the outside of luggage caused by normal wear and tear.
wear and tear on sth The fuel additive reduces wear and tear on car engines.
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depreciation