Etymologically

mercenarius

Etymology and origin of the Latin word mercenarius

Confidence
Established
Formation
Derivation
First attested
Plautus
Ultimate origin
Latin (mercēs)
Etymology tree
inherited borrowed derived
Latin mercenarius
English mercenary

Pronunciation

  • IPA (Classical): [mɛr.keːˈnaː.ri.ʊs][1]
  • IPA (Ecclesiastical): [mer.t͡ʃeˈnaː.ri.us][1]

Forms

mercēnārius (feminine mercēnāria, neuter mercēnārium); first/second-declension adjective[1] The older spelling is mercennārius.[2][3]

Etymology

It is from *mercēdinārius, later *mercēdnārius, from mercēs “pay, wages” and -ārius, with the cluster /dn/ assimilated to /nn/.[2][4][1] The OLD also allows a base *mercēdō, comparing mercēdōnius.[2] Etymonline traces mercēs to merx “wares”.[5]

Earliest recorded meaning

Plautus, in the Vidularia, has someone say he does not believe a man is a hired labourer.[2] Köbler dates Plautus c. 250–184 BC.[6]

Semantic evolution

As an adjective it meant working for pay, hired, as Cato's hired soldiers and Caesar's partly hired troops.[2] As a noun it was a hired worker, especially on a farm: Varro says unhealthy land is better worked by hired men than by slaves.[2] It was also a mercenary soldier, as in Livy, and someone paid to do unlawful acts, a tool, as Cicero calls a man Oppianicus' creature.[2] In a bad sense it meant influenced by gain, as Cicero's mercenary praetor and his līberālitās mercennāria “self-interested generosity”.[2][7] Döderlein notes that mercēnāriī work not for their own interest but for pay, as opposed to the owner who hires them.[8]

British medieval writers used it of hired workers, professional soldiers, and figuratively.[9] Its descendants include Italian mercenario and Spanish mercenario.[1] English mercenary is recorded in the late 14th century.[5]

Timeline

  • c. 250–184 BC – Plautus uses it of a hired labourer.[2][6]
  • 234–149 BC – Cato speaks of hired soldiers.[2][6]
  • 81–43 BC – Cicero uses it of a mercenary praetor.[2][6]
  • late 14th century – English mercenary is recorded.[5]

Meanings

Adjective

  1. Hired, working for pay.[2][1]
  2. Mercenary, influenced by gain.[2][1]

Noun

  1. A hired worker, hireling.[2][3]
  2. A mercenary soldier.[2]
  3. A person hired for unlawful acts, a tool.[2]

References

  1. ^ a b c d e f g 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 Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  5. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  7. ^ Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  8. ^ Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
  9. ^ 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

Descendants

Cite this entry

“Mercenarius.” Etymologically, 15 Oct. 2026, etymologically.com/la/mercenarius. Accessed 16 Oct. 2026.

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