can't

Not able to

Can't is the contraction of cannot, expressing inability or impossibility: I can't reach the top shelf, You can't be serious.

It also conveys prohibition or refusal: You can't park here, I can't let you do that.

In casual speech, can't often softens won't: I can't make it tonight may mean unwillingness rather than true inability.

inability

unable

Lacking necessary capacity

impotent · unequipped · unqualified · incompetent · lack · deficient · inadequate · unfit · ineffectual · impossible

contraction

couldn't

Past inability marker

must not · mustn't · mightn't · need not · needn't · ain't · cain't

refusal

won't

Contraction showing refusal

deny · unwilling · no way · absolutely not · never · nope · no chance · forget it · count me out · over my dead body

prohibition

forbidden

Not allowed

barred · restricted · off-limits · impermissible · taboo · unauthorized · disallowed · illegal · unlawful · against the rules

impossibility

unattainable

Impossible to acquire

insurmountable · unrealizable · impracticable · unworkable · undoable · unrealistic · out of the question · inconceivable · unthinkable · no way

Opposites
ability/capability

can'tcan

Cylindrical metal container

could · is able to · able · may · capable

certainty/determination

can'twill

Faculty of deliberate choice

must · shall · bound to

possibility/feasibility

can'tcan

Cylindrical metal container

could · might · possible · feasible · achievable

Phrases
Family

can, canned, cannot, cans, canny, canning, uncanny, recant, cant

Familiarity
Top 100
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G