adjective
1.
Synonyms: indestructible , imperishable, incorruptible, inexterminable, inextinguishable, irrefragable, irrefrangible, quenchless, undestroyable, unperishable
2.
Synonyms: indelible , ineffaceable, ineradicable, inerasable, inexpungible, uneradicable, unerasable