I. (ˈ)in, ən+ adjective
Etymology: Middle English, from Middle French or Late Latin; Middle French, from Late Latin incurabilis, from Latin in- in- (I) + curabilis curable — more at curable
1. : impossible to cure
an incurable disease
2. : admitting of no remedy or correction
incurable optimism
: being a thing specified beyond any possibility of alteration or control
these incurable busybodies
II. noun
( -s )
: a person diseased beyond cure