(a.) Not perishable; not subject to decay; indestructible; enduring permanently; as, an imperishable monument; imperishable renown.

amaranthine deathless embalmed ever-fresh everlasting fadeless frozen immortal impregnable incorruptible indelible indestructible ineffaceable ineradicable inexpugnable inextinguishable invincible invulnerable irrefragable never-dying nonperishable quenchless undampable undestroyable undying unfading unquenchable