incommutable

not capable of changing or being changed a traditionalist and staunch opponent of relativism, she argues that there is indeed a timeless and incommutable moral code by which all must abide Synonyms fixed, hard-and-fast, immutable, inalterable, inflexible, invariable, unalterable, unchangeableRelated Words changeless, constant, determinate, established, set, settled, stable, steadfast, steady, unaltered, unchanging, unvarying; immovable, unmovableNear Antonyms adaptable, adjustable; fickle, fluctuating, inconstant, uncertain, unsettled, unstable, varying; plastic, pliable, pliant, supple, willowyAntonyms alterable, changeable, elastic, flexible, mutable, variable