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Perfect active participle of experior ‎(test, attempt, experience), but with passive meaning.



expertus m ‎(feminine experta, neuter expertum); first/second declension

  1. tested; having tested
  2. proved; having proven
  3. experienced; having experienced
    • Experto crede
      Trust in one experienced


First/second declension.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
nominative expertus experta expertum expertī expertae experta
genitive expertī expertae expertī expertōrum expertārum expertōrum
dative expertō expertō expertīs
accusative expertum expertam expertum expertōs expertās experta
ablative expertō expertā expertō expertīs
vocative experte experta expertum expertī expertae experta



  • expertus in Charlton T. Lewis & Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • expertus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • expertus” in Félix Gaffiot (1934), Dictionnaire Illustré Latin-Français, Paris: Hachette.
  • Meissner, Carl; Auden, Henry William (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • he has had many painful experiences: multa acerba expertus est
    • (ambiguous) we know from experience: experti scimus, didicimus