archaic

adjectives

so extremely old as seeming to belong to an earlier period

"a ramshackle antediluvian tenement"; "antediluvian ideas"; "archaic laws"

antediluvian, antiquated, archaic

little evolved from or characteristic of an earlier ancestral type

"archaic forms of life"; "primitive mammals"; "the okapi is a short-necked primitive cousin of the giraffe"

archaic, primitive