longevous

[ lon-jee-vuh s, lawn- ]
/ lɒnˈdʒi vəs, lɔn- /

adjective Archaic.

long-lived; living to a great age.

Origin of longevous

1670–80; < Latin longaevus aged, equivalent to long(us) long1 + aev(um) time, age, lifetime + -us adj. suffix; see -ous