irreformable

[ir-i-fawr-muh-buh l]
adjective
  1. insusceptible to reforming influences; incorrigible.
  2. not subject to improvement; final; perfect: irreformable doctrine.

Origin of irreformable

First recorded in 1600–10; ir-2 + reform + -able
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for irreformable

Historical Examples of irreformable