incurable

Etymology

From Old French incurable, from Late Latin incurabilis.

adj

1. Of an illness, condition, etc, that is unable to be cured; healless.
   They were labouring under a profound, and, as it might have seemed, an almost incurable ignorance. 1854, James Stephen, On Desultory and Systematic Reading
2. (figurative) Irremediable, incorrigible.
   an incurable romantic

noun

1. One who cannot be cured.