immutable Synonyms

changeless permanent unappealable undying unexceptionable uniform unpenetrable unending unchanging unalterable unchangeable timeless steady perpetual persisting persistent reverseless rigid stable static stationary steadfast undeviating unadaptable hard and fast nonmodifiable unadjustable unvaried unconvertible undiscouraged undiversified undividable unexchangeable unvarying age-long unaltered robotlike long-lasting long-term carved in stone set in stone unmodifiable nonspatial unchanged uninjectable abiding eternal even everlasting firm