eternal

1 having an existence or validity that does not change or diminish a charming fable that presents some eternal truths in a fresh way Synonyms ageless, continuing, dateless, enduring, abiding, everlasting, immortal, 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constant, stable, stationary, steady, unchanging, unvaryingNear Antonyms antiquated, archaic, dated, obsolete, outdated, outmoded, out-of-date, outworn, passé

2 lasting forever the quest for some magic potion that promises eternal youth Synonyms ceaseless, dateless, deathless, endless, everlasting, immortal, 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