-n't
a contraction of not: didn't; hadn't; couldn't; shouldn't; won't; mustn't.
Words nearby -n't
British Dictionary definitions for -n't
-n't
contraction of
not: used as an enclitic after be and have when they function as main verbs and after auxiliary verbs or verbs operating syntactically as auxiliaries
can't; don't; shouldn't; needn't; daren't; isn't