Incurable

a. [Prefix in, not, and curable; Fr., Pr., & Sp. incurable, Pg. incuravel, It. incurabile, Lat. incurabilis.]

1. Not curable; incapable of being cured; beyond the power of skill or medicine; as, an incurable disease.
2. Not admitting remedy or correction; irremediable; remediless; as, incurable evils.

They were laboring under a profound, and, as it might have seemed, an almost incurable ignorance. Sir J. Stephens. Syn.—Irremediable; remediless; irrecoverable; irretrievable.