(adj) not changeable or subject to change; -Ashley Montagu, Ant. changeable, Example:a fixed and unchangeable part of the germ plasm; the unchangeable seasons; one of the unchangeable facts of life
[きゅうたいいぜん(uK), kyuutaiizen (uK)] (adj-na, adj-no, adj-t, adv-to, n) remaining unchanged (from the old state of things); none the better for the change (if at all)
[こげつく, kogetsuku] (v5k, vi) (1) to get burned and stuck on (e.g. rice in a pan); (2) to become uncollectable (e.g. debt or loan); to become irrecoverable; (n) (3) to remain unchanged (e.g. stock market)