imperishable

1 impossible to destroy energy is imperishable Synonyms indestructible, inextinguishableRelated Words incorruptible; deathless, immortal, perpetual, undying; indelible, indissoluble, ineffaceable, ineradicable, inexpungible; durable, enduring, everlasting, lasting, permanent, unbreakable; strong, sturdy, toughNear Antonyms mortal; impermanent, transient, transitory; breakable, delicate, flimsy, fragile, frailAntonyms destructible, extinguishable, perishable

2 having an existence or validity that does not change or diminish the belief that through military glory one could achieve imperishable fame Synonyms ageless, continuing, dateless, enduring, eternal, everlasting, immortal, abiding, 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constant, stable, stationary, steady, unchanging, unvaryingNear Antonyms antiquated, archaic, dated, obsolete, outdated, outmoded, out-of-date, outworn, passé