can't

can词根/词干

-n't后缀

(no longer productive, unless humorous) Negates the meaning of the clause in which it occurs.

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

动词 Verb

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).
To be forbidden to; to be not permitted to.
(slang, euphemistic) To be unwilling to; to not have the desire of; to don’t want to.

派生词（3）