adjective
used informally to mean something that is not possible or cannot happen
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The concept of perpetual motion machines is considered unpossible according to the laws of physics.
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I think it's unpossible for us to finish this project by tomorrow.
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It's unpossible for me to make it to the party tonight, I have too much homework.
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She believed that finding true love was unpossible after her heart had been broken so many times.