Englishimperishable
adjective
the fruits of his inspired labours are imperishable:
enduring, everlasting, undying, deathless, immortal, timeless, ageless, perennial, lasting, long-lasting;
indestructible, inextinguishable, ineradicable, unfading, undiminished, permanent, never-ending, never dying, without end;
rare sempiternal, perdurable.
imperishable Oxford Dictionary of English