Reverse Dictionary: UNCHANGEABLE

UNCHANGEABLE, UNCHANGED, UNCHANGING

ADJECTIVES
1528 — IMPERMUTABLE unchangeable → obs.
1639 — IMMUTE unchanged → obs.
1788 — IMMUTATE unchanged 
1965 — BRANDED IN THE HIDE unchanging; uncompromising in principle; dyed-in-the-wool → Amer. dial.

NOUNS
2000 — SAME-OLD an unchanged condition → UK sl.