irreparable
macmillandictionary.com/dict … rreparable
irreparable harm or damage is extremely bad and cannot be repaired or improved
- The disease does irreparable damage to the nervous system.
ldoceonline.com/dictionary/irreparable
irreparable damage, harm etc is so bad that it can never be repaired or made better:
- Extensive mining will cause irreparable damage to the area.
oxfordadvancedlearnersdictio … rreparable
too bad or too serious to repair or put right
- to cause irreparable damage/harm to your health
- Her death is an irreparable loss.