antediluvian

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UK:^*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌæntidəˈluːvɪən/

US:USA pronunciation: IPAUSA pronunciation: IPA/ˌæntidɪˈluviən/

US:USA pronunciation: respellingUSA pronunciation: respelling(an′tē di lo̅o̅′vē ən)

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antediluvian
WordReference English Thesaurus © 2025

Sense: Adjective: very old

Synonyms:

before the Flood, antiquated, out-of-date, old , old-fashioned , ancient , outmoded, unenlightened, primitive, fossilized, fossilised (UK), long in the tooth (slang), superannuated, archaic

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