adjective
not capable of being imagined or grasped mentally; unbelievable
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The idea of a world without technology is inconceivable in this day and age.
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It's inconceivable that she didn't show up to the party after confirming multiple times.
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I can't believe he actually ate the whole pizza by himself, that's inconceivable!
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The amount of love she has for her children is inconceivable, it knows no bounds.