antediluvian
an-te-di-lu-vi-an
adjective
Extremely old-fashioned, primitive, or completely outdated.
"His antediluvian views on technology were amusing."
adjective
Relating to the period before the Biblical Great Flood.
"Antediluvian creatures roamed the ancient Earth."
Thesaurus
Synonyms: antiquated, archaic, old, antediluvian patriarch, antediluvial, ancient