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From ad- ‎(to) +‎ sum ‎(I am).



adsum ‎(present infinitive adesse, perfect active adfuī, future participle adfutūrus); irregular conjugation

  1. (with dative) I am present
  2. (with dative) I arrive
  3. (with dative) I attend


   Conjugation of adsum (highly irregular, suppletive, active only)
indicative singular plural
first second third first second third
active present adsum ades adest adsumus adestis adsunt
imperfect aderam aderās aderat aderāmus aderātis aderant
future aderō aderis, adere aderit aderimus aderitis aderunt
perfect adfuī adfuistī adfuit adfuimus adfuistis adfuērunt, adfuēre
pluperfect adfueram adfuerās adfuerat adfuerāmus adfuerātis adfuerant
future perfect adfuerō adfueris adfuerit adfuerimus adfueritis adfuerint
subjunctive singular plural
first second third first second third
active present adsim adsīs adsit adsīmus adsītis adsint
imperfect adessem, adforem adessēs, adforēs adesset, adforet adessēmus, adforēmus adessētis, adforētis adessent, adforent
perfect adfuerim adfuerīs adfuerit adfuerīmus adfuerītis adfuerint
pluperfect adfuissem adfuissēs adfuisset adfuissēmus adfuissētis adfuissent
imperative singular plural
first second third first second third
active present ades adeste
future adestō adestō adestōte adsuntō
non-finite forms active passive
present perfect future present perfect future
infinitives adesse adfuisse adfutūrus esse, adfore
participles adfutūrus


  • adsum in Charlton T. Lewis & Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • adsum in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • adsum” in Félix Gaffiot (1934), Dictionnaire Illustré Latin-Français, Paris: Hachette.
  • Meissner, Carl; Auden, Henry William (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to be there at a given time: ad tempus adesse
    • to assist, stand by a person: adesse alicui or alicuius rebus (opp. deesse)
    • (1) to be attentive; (2) to keep one's presence of mind: animo adesse
    • to be quite unconcerned: animo adesse (Sull. 11. 33)
    • to be present at divine service (of the people): sacris adesse
    • to take no part in politics: rei publicae deesse (opp. adesse)
    • to issue a proclamation calling on the senators to assemble in full force: edicere, ut senatus frequens adsit (Fam. 11. 6. 2)
    • to appear in court: in iudicium venire, in iudicio adesse