indestructible

adj.

[1]	durable , long-lasting , everlasting , eternal , endless , perennial , permanent , fixed , unchanging , changeless , unchangeable , indelible , ineradicable , inextirpable , immutable , unalterable , constant , undying , non-perishable , imperishable , unbreakable , non-breakable , shatter-proof
[2]	durable , perdurable , undestroyable