imperishable       
adjective  literary uk/ɪmˈper.ɪ.ʃə.bəl/ us/ɪmˈper.ɪ.ʃə.bəl/
 永存的,不朽的
lasting for ever, or never becoming weaker with age
 Synonyms: abidingdurableenduringindelibleindestructibleineradicable ingrainedlastinglong-lastingpermanent 
Compare: perishable