perdurable
Concise Oxford English Dictionary © 2008 Oxford University Press:
perdurable /pəˈdjʊərəb(ə)l/
▶adjective formal enduring continuously; permanent.
– derivatives
perdurability noun,
perdurably adverb.
perdurability noun,
perdurably adverb.
– origin ME: via OFr. from late L. perdurabilis, from L. perdurare ‘endure’.
'perdurable' also found in these Oxford entries:

