immutable

Reading level: hard

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

adjective not subject or susceptible to change or variation in form or quality or nature

From Middle English immutable, from Latin immūtābilis (“unchangeable”); im- + mutable.

Mr. Sabin’s expression was immutable. — The Yellow Crayon, E. Phillips (Edward Phillips) Oppenheim
'To an adept nothing is immutable. — The People of the Black Circle, Robert E. (Robert Ervin) Howard
The permanent and the immutable are persistent. — Les Misérables, Victor Hugo

changeless

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