Etymologically

Etymology and origin of the Latin word adsum

Confidence
Established
Formation
Derivation
First attested
c. 250–184 BC, Plautus
Ultimate origin
Proto-Indo-European (*h₁es-)
Etymology tree
inherited borrowed derived
Latin sum
French soit
Latin adsum
Latin absum
Latin prosum
Latin possum
Latin possibilis
English possible
French possible
English impossible
French impossible
Latin intersum
Latin insum
Latin supersum
Latin desum

Pronunciation

  • Classical: [ˈas.sũː][1]
  • Ecclesiastical: [ˈad.sum][1]

Forms

adsum (present infinitive adesse, perfect active adfuī, future active participle adfutūrus); irregular conjugation, suppletive, no passive, no supine stem except in the future active participle, no gerund[1] It is also spelled assum, with the perfect affuī.[2][3] Inscriptions have atesse, atsint and arfuise;[2] Plautus and inscriptions use the old subjunctive adsiēs, adsient.[2][3]

Etymology

It is formed from Latin ad- + sum, “to be at”.[2][3][1] The verb “to be” continues Proto-Indo-European *h₁es- (“to be”).[4] Oscan has the same compound in the future perfect adfust.[4]

Earliest recorded meaning

It is found from Plautus on: nunc amō, quia nōn adest, “I love her now because she is not here”.[2][5]

Semantic evolution

Adesse is “to be present, be here”: answering a call, adsum means “here I am”, and the imperative ades “stay, don't go”.[2] It is used of being present as a witness or spectator, of attending a meeting, taking part, and appearing in court when summoned; of persons who have arrived (“to have come”), of a time or opportunity that has come, and of what is near or imminent.[2]

With the dative it means “to stand by, help”: of friends, of an advocate supporting someone in court, and of gods favourable to a prayer (adsīs, ō Tegeaee, favēns).[2] Adesse animō is “to pay attention” or “to keep one's wits”.[2] In Church Latin it also means “be mindful”.[6]

Timeline

  • c. 250–184 BC – First found in Plautus.[2][5]
  • 204–169 BC – Ennius: vīsus Homērus adesse poēta, “the poet Homer seemed to be present”.[2][5]
  • 81–43 BC – Cicero uses it of an advocate supporting a client.[2][5]
  • 70–19 BC – Virgil: adsīs, ō Tegeaee, favēns, “be with us, Tegean god, in favour”.[2][5]

Meanings

Verb

  1. To be present, be here;[2][7] adsum, here I am.[2]
  2. To be still here, stay.[2]
  3. To be present (as a witness or spectator);[2] to attend (a meeting), take part.[2]
  4. To appear (in answer to a summons).[2]
  5. To have come, have arrived;[2][1] (of time) to have come.[2]
  6. To stand by, assist, support;[2][1] (law) to appear as advocate (for).[2]
  7. (of gods) To be at hand with help; to look favourably on.[2]
  8. To be near, be at hand;[2] (of time, events) to be imminent.[2]
  9. To exist, be present (of qualities);[2] to be present to the mind.[2]
  10. To pay attention;[2] adesse animō, to attend; to keep one's wits.[2]

Usage notes

In Plautus' Poenulus adsum must be pronounced assum, because the joke turns on assum “roasted”.[7]

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z 27 28 29 30 Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  7. ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
Cite this entry

“Adsum.” Etymologically, 18 Oct. 2026, etymologically.com/la/adsum. Accessed 18 Oct. 2026.

Last edited on . ·