immortal

1 lasting forever the age-old quest for immortal fame Synonyms ceaseless, dateless, deathless, endless, eternal, everlasting, permanent, perpetual, undying, unendingRelated Words durable, enduring, lasting, long-lived, persistent, stubborn; imperishable, indefeasible, indefectible, indelible, indestructible, indissoluble, inexpungible; timeless; abiding, stable, standing, steadfast, steady, unfailing, unfaltering; continual, continuing, continuous, incessant, unbroken, unceasing, uninterrupted, unremittingNear Antonyms ephemeral, evanescent, fleeting, fugacious, fugitive, momentary, passing, short-lived, transitory; interim, provisional, short-termAntonyms impermanent, mortal, temporary, transient

2 having an existence or validity that does not change or diminish vowed that his hatred of that family was immortal and that someday he'd get his revenge Synonyms ageless, continuing, dateless, enduring, eternal, everlasting, abiding, imperishable, lasting, ongoing, perennial, perpetual, timeless, undyingRelated Words ceaseless, endless, permanent; changeless, constant, stable, stationary, steady, unchanging, unvaryingNear Antonyms antiquated, archaic, dated, obsolete, outdated, outmoded, out-of-date, outworn, passé