indefeasible Synonyms

insusceptible of change sure sacrosanct reverseless relentless prescribed permanent perdurable lasting irrevocable irreversible irretrievable unalienable unremitting unyielding unforfeitable undisputed unchallenged unchallengeable unvarying always-on untransferable noninfectious noncommunicable unmodifiable unchanging irresoluble inviolable intransmutable constant chronic chartered changeless certain ceaseless boundless authorized allowed ageless absolute constitutional immutable imperishable intractable insuperable innate inherent inextinguishable inert indomitable