can't

verb3

1. •
   Cannot (negative modal auxiliary); be unable to; not have the ability to (whether due to lacking relevant strength or skill or knowledge or supplies, or due to logical impossibility, etc).

   • I can’t quite get it to work.
   • Shut up, can’t you?
2. •
   To be forbidden to; to be not permitted to.

   • You can’t enter the hall without a ticket.
3. •
   (slang, euphemistic) To be unwilling to; to not have the desire of; to don’t want to.

   • Will you come to dinner with us tonight? Can't; already have plans this evening.