Etymologically

aggressor

Etymology and origin of the Latin word aggressor

Confidence
Established
Formation
Derivation
First attested
c. 325 Juvencus More words from the 4th century
Ultimate origin
Latin aggredior
Etymology tree
inherited borrowed derived
Latin gradior
Latin aggredior
Latin aggressor
English aggressor
From the same root
Latin circumgredior ← gradior
Latin congredior ← gradior
Latin dīgredior ← gradior
Latin grassor ← gradior
Latin gressus ← gradior
Latin ingredior ← gradior
Latin praegredior ← gradior
Latin praetergredior ← gradior
Latin prōgredior ← gradior
Latin regredior ← gradior
Latin suggredior ← gradior
Latin supergredior ← gradior
Latin trānsgredior ← gradior
Spanish regreso ← gradior
Latin aggressiō ← aggredior

Pronunciation

  • Classical: [aɡˈɡrɛs.sɔr][1]
  • Ecclesiastical: [aɡˈɡrɛs.sor][1]

Forms

aggressor m (genitive aggressōris); third declension[1]

Etymology

It is from Latin aggredior + -tor, the agent noun of the verb meaning “to approach, attack”.[2][3][1] The verb is a compound of gradior (“to step”) with ad-; its participle ⟨aggressus⟩ has the regular ⟨-e-⟩ of a non-initial syllable.[4]

Earliest recorded meaning

The legal writers quoted in the Digest and the Sententiae of Paulus use it of attackers and robbers: those who harbour robbers are said to be no less guilty than the attackers themselves.[3][5][6]

Semantic evolution

It was at first a word of the lawyers, often meaning a robber who attacks travellers, and is paired with latrones “brigands”.[5][6][3] The OLD spells it also adg-.[2] In verse Juvencus uses it of an attacker who must first bind the arms of the guards, and Augustine says that in paradise no thief or attacker was feared.[3][6] The Code of Justinian says that whoever kills an aggressor need fear no charge.[3]

Medieval Latin kept the senses “assailant” and “robber”; in an Old English glossary it is glossed with words for a robber.[7][8] English borrowed it in the 1670s for the person who attacks first.[9]

Timeline

  • c. 325 AD – Juvencus uses it in his verse Gospels.[3][10]
  • 354–430 AD – Augustine says that no robber or attacker was feared in paradise.[3][6][10]
  • 533 AD – The Digest collects the jurists' passages that use it.[5][10]
  • 1670s – English borrows it as aggressor.[9]

Meanings

Noun

  1. An attacker, assailant.[2][5]
  2. (law) A robber who attacks people, a highwayman.[5][6][7]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f g Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ 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 Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b c d e Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  7. ^ a b Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
  8. ^ Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  9. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  10. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Aggressor.” Etymologically, 13 Nov. 2026, etymologically.com/la/aggressor. Accessed 13 Nov. 2026.

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