The word Clean generally means free from dirt, marks, or stains. Because it is used in various contexts (a clean room, a clean record, clean water), it has several different opposite words (antonyms) in English.
The word 'Clean' comes from the Old English word clΗ£ne, which meant pure, clear, or chaste.
The most direct and widely used opposite word for clean is Dirty.
If you want to sound more fluent or specific, you can use these alternatives:
Sometimes 'clean' is used metaphorically:
Yes, **Unclean** is a valid antonym. However, it is mostly used in religious or formal contexts to describe something impure or forbidden (e.g., Some ancient texts describe certain animals as unclean).
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