From adversus (“set opposite; turned toward”), perfect passive participle of advertō (“turn toward”), from ad- + vertō (“turn”).
adversor (present infinitive adversārī, perfect active adversātus sum); first conjugation, deponent
- I stand opposite; I am against, resist, oppose; withstand.
- adversor in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
- adversor in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
- “adversor” in Félix Gaffiot’s Dictionnaire Illustré Latin-Français, Hachette (1934)
- Carl Meissner; Henry William Auden (1894) Latin Phrase-Book, London: Macmillan and Co.
- to look after, guard a person's interests, welfare: rationibus alicuius prospicere or consulere (opp. officere, obstare, adversari)