Not subject to reform or improvement.

सुधार संभव नहीं।

English Usage: His beliefs were so entrenched that they seemed unreformable.

Hindi Usage: उसके विश्वास इतने दृढ़ थे कि वे सुधार संभव नहीं लगते थे।

The state of being unreformable.

सुधार नहीं होने की अवस्था।

English Usage: The discussion centered around the concept of unreformable in the justice system.

Hindi Usage: चर्चा न्याय प्रणाली में सुधार नहीं होने की अवधारणा के चारों ओर केंद्रित थी।