INVARIABLE

adj. 1 unchanging, changeless, unvarying, invariant, unwavering, constant, steady, stable, regular; fixed, fast, set, rigid, uniform, unfailing, unexceptional She is invariable in her opinion of a woman's right to abortion His invariable routine calls for a dawn swim, regardless of the weather. 2 immutable, unchangeable, unalterable, unmodifiable The law of supply and demand is invariable 3 permanent, fixed, enduring, abiding, eternal, unaltered, unvarying, unchanged, unvaried, unaltered, unmodified The positions of the stars appear to be invariable