Contronyms

Can A Word Be Its Own Opposite?

Yes! They are called Contronyms—words that are their own antonyms, depending on usage.
Here are a few examples

Dust :
can mean ‘to add fine particles’ or ‘to remove fine particles’.

Left :
can mean both
‘remaining’ and ‘departed’.

Off :
can mean both ‘activated’ and ‘deactivated’.
Eg:- “Set off” – Activated
“ Switch off – Deactivated

Oversight :
means both ‘watchful care’ and ‘an inadvertent error’.

Screen :
can mean both ‘to show’ and ‘to hide’.

Sanction
can mean both ‘a penalty for disobeying a law’ and ‘official permission or approval for an action.

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E...

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1...

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B...

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