Examples from the Web for irreformable
Irreformable, ir-re-for′ma-bl, adj. not reformable, not subject to revision or improvement.
Then I imagined their recognising with a blush and a shrug that she was unteachable, irreformable.The Real Thing and Other Tales|Henry James
All dogmatic decrees of the Pope, made with or without his general council, are infallible and irreformable.