Etymology and origin of the Latin word legionarius
- Confidence
- Established
- Formation
- Derivation
- First attested
- c. 50 BC, Caesar
- Ultimate origin
- Proto-Indo-European (*leǵ-)
Forms
legiōnārius (feminine legiōnāria, neuter legiōnārium); first/second-declension adjective[1]
Etymology
It is formed from legiō (“legion”) with the suffix -ārius.[2][3][1] The noun comes from legō (“to gather, choose”), which de Vaan derives from Proto-Italic *lege- and Proto-Indo-European *leǵ- (“to collect”), cognate with Ancient Greek λέγω (légō, “to collect, count, speak”).[4][5]
Earliest recorded meaning
The TLL finds it from Caesar on,[3] who has legiōnāriī mīlitēs legiōnis decimae, “legionary soldiers of the Tenth Legion”;[6] Asinius Pollio, in a letter to Cicero, has legiōnārius mīles;[6][4] Köbler gives Cicero.[6][4]
Semantic evolution
It is of or belonging to a legion, as Caesar's legionary cohorts, and as a masculine noun a legionary soldier, as Caesar's “the legionaries had some grain, the light-armed and auxiliaries none”.[2][6] Livy and Tacitus also use the noun.[2]
Timeline
Meanings
Adjective
Noun
Related words
References
- ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
- ^ a b c d e f Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
Cite this entry
“Legionarius.” Etymologically, 19 Oct. 2026, etymologically.com/la/legionarius. Accessed 19 Oct. 2026.
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