antediluvial

/ˌæntidɪˈluːviəl/
adjective
  1. Relating to the time before the biblical Flood; very ancient or old-fashioned.
    • The old house had an antediluvial heating system that barely worked.
    • The museum displayed antediluvial artifacts from the earliest human settlements.
    • His antediluvial views on education surprised his modern colleagues.
Antonyms
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