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can't (EN)
verb

verb “can't”

can't, cannot, past tense couldn't
  1. lacks the ability or means to do something
    She can't swim, so she stays in the shallow end of the pool.
  2. is not allowed or permitted to do something
    You can't park your car in front of the fire hydrant.
  3. indicates that something is not logically possible
    She can't have eaten the cake; she's allergic to gluten.