unalterable
1. [ adjective ] not capable of being changed or altered
Synonyms: inalterable
Examples:

"unalterable resolve" "an unalterable ground rule"

Related terms: alterable final incurable
2. [ adjective ] (law) of a sentence; that cannot be changed
Examples:

"an unalterable death sentence"

Related terms: law incommutable
3. [ adjective ] remaining the same for indefinitely long times
Synonyms: changeless
Related terms: unchangeable
Similar spelling:   unalterably
  unaltered
  unilateral
  unalterability
  unleaded
  unliterary
  unlittered
  unlettered
  unilaterally
  unhealed
  unilateralist
  unilateralism