unchangeable
1. [ adjective ] not changeable or subject to change
Examples:

"a fixed and unchangeable part of the germ plasm"-Ashley Montagu "the unchangeable seasons" "one of the unchangeable facts of life"

Related terms: changeable fixed confirmed static carved_in_stone changeless permanent constant changeableness
Similar spelling:   unexchangeable
  unchangeably
  unchanged
  unchangeability
  unchanging
  unchangingness