Synonyms of unchangeable

Adjective

1. unchangeable (vs. changeable), changeless, unalterable, confirmed, fixed, frozen, set in stone, carved in stone, static, stable, unchanging, constant, permanent#1, lasting

usage: not changeable or subject to change; "a fixed and unchangeable part of the germ plasm"-Ashley Montagu; "the unchangeable seasons"; "one of the unchangeable facts of life"