Can't Definition

kănt
contraction
Cannot.
Webster's New World

Cannot; is unable to; does not have the ability to.

I can't quite get it to work.
Wiktionary

Is forbidden to; is not permitted to.

You can't enter the hall without a ticket.
Wiktionary

Origin of Can't

  • can +‎ -n't, since 1706 or earlier.

    From Wiktionary