Etymologically

Etymology and origin of the Latin word obsessor

Confidence
Established
Formation
Derivation
First attested
c. 250–184 BC, Plautus
Ultimate origin
Latin (sedeō)
Etymology tree
inherited borrowed derived
Latin obsideo
Latin obsidium
Latin obsessor
Latin obsessio

Forms

obsessor m (genitive obsessōris); third declension[1]

Etymology

It is from Latin obsideō (“to sit at; to besiege”) + -tor,[2][3] also spelled ⟨ops-⟩.[2] The verb is a compound of ob- and sedeō (“to sit”),[4] which goes back to Proto-Italic *sed-ē- and Proto-Indo-European *sed-eh₁- (“to be seated”).[4]

Earliest recorded meaning

It is first found in Plautus' Pseudolus, with a genitive: fui hodie solus obsessor fori, “I alone have haunted the forum today”.[2][5][3]

Semantic evolution

The early sense is one who occupies or haunts a place: Ovid calls a water snake obsessor of living waters.[2][5] Lewis and Short find it only in early Latin and poetry.[5] In military use it means a besieger: Cicero has obsessor curiae, Livy the besieger of Luceria, and Tacitus writes that a fire brought more fear to the besieged than to the besiegers.[5][2]

Timeline

  • c. 250–184 BC – Plautus uses it of someone haunting the forum.[2][5][6]
  • 81–43 BC – Cicero uses it of besieging the senate house.[5][6]
  • 43 BC–18 AD – Ovid uses it of a snake haunting a spring.[2][5][6]
  • 98–115 AD – Tacitus uses it of besiegers.[2][5][6]

Meanings

Noun

  1. One who occupies or haunts (a place), a frequenter.[2][5]
  2. A besieger, blockader.[2][5]

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b 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 f g h i j Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Obsessor.” Etymologically, 20 Oct. 2026, etymologically.com/la/obsessor. Accessed 20 Oct. 2026.

Last edited on . ·