Etymologically
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arma

Etymology and origin of the Latin word arma

History

Pronunciation

  • IPA (Classical): [ˈar.ma][1]
  • IPA (Ecclesiastical): [ˈar.ma][1]

Forms

arma n pl (genitive armōrum); second declension[1]

Etymology

It goes back to Proto-Italic *armo-, from Proto-Indo-European *h₂(e)r-mo- (“fitting”), from the root *h₂er- (“to fit together, join”).[2][1] The meaning developed from “what is fitted together” through “tools” to “weapons”.[2][1] armentum “herd” is an independent formation from the same root, and ars and artus are also related.[2][1]

Cognate with Sanskrit ऋत (ṛtá-, “order, truth”), Sanskrit अरम् (áram, “fittingly”), Ancient Greek ἀραρίσκω (ararískō, “to fit together”), Ancient Greek ἅρμα (hárma, “chariot”) and Old Armenian արարի (arari, “I made”).[2][3]

Earliest recorded meaning

It is found from Plautus onwards,[2][4] who jokes that Vulcan must have made the arms a soldier brought home, and Ennius has “all demand arms”.[3]

Semantic evolution

The word meant arms and weapons in general, and more specifically defensive armour or a shield, or weapons for close combat as opposed to missiles (tela).[3][5] From the weapons it passed to the soldier's calling, to war as an instrument of policy, as in Cicero's silent leges inter arma “laws are silent amid arms” and cedant arma togae, and to the armed forces themselves.[3] Virgil's arma virumque cano “I sing of arms and the man” opens the Aeneid.[3]

The older sense “equipment” survived in the poets, for farm tools, a ship's tackle and Daedalus' wings.[3][6] In Late Latin the neuter plural was taken as a feminine singular arma “a weapon”, the source of the Romance words.[1][7] Medieval texts also use it for a coat of arms, and the Italian cry all'arme “to arms” gave English alarm.[8][9]

Timeline

  • 204–169 BC – Ennius writes that all demand arms.[3][4]
  • c. 250–184 BC – Plautus jokes about armour made by Vulcan.[3][4]
  • 81–43 BC – Cicero writes cedant arma togae and silent leges inter arma.[3][4]
  • 70–19 BC – Virgil opens the Aeneid with arma virumque cano.[3][4]
  • 6th century – The feminine singular arma “weapon” appears.[7]
  • Middle Ages – It also means a coat of arms.[8]

Meanings

Noun

  1. Arms, weapons, ad arma: to arms![3][5]
  2. Defensive arms, armour; a shield.[3][5]
  3. Weapons for close combat, as opposed to missiles.[3]
  4. Military service, soldiering.[3]
  5. War, fighting, as opposed to peace.[3]
  6. Armed forces, troops; one side in a war.[3]
  7. Natural weapons (claws, teeth); figuratively, means of defence.[3]
  8. Tools, equipment; a ship's tackle.[3][6]
  9. (Medieval Latin) A coat of arms, blazon.[8]

Word family

  • armāmentum
  • armārium
  • armentum
  • armidoctor
  • armifer
  • armiger
  • armigera
  • armilustrium
  • armipotēns
  • armisonus
  • armō
  • coarmius
  • ars
  • artus
  • rītus
  • English arms
  • English army
  • English alarm

Usage notes

It is a plural noun, with the genitive armorum, or armum in Pacuvius and Accius.[3][5] The sense “herd” belongs to the related armentum.[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 de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  3. ^ a b c d e f g h i j k l m n o p q r s Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  7. ^ a b Buchi, Éva; Schweickard, Wolfgang, eds. (2008–), Dictionnaire Étymologique Roman (DÉRom), Nancy: ATILF, http://www.atilf.fr/DERom
  8. ^ a b c Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  9. ^ Harper, Douglas, Online Etymology Dictionary, https://www.etymonline.com
Cite this entry

“Arma.” Etymologically, 10 Oct. 2026, etymologically.com/la/arma. Accessed 10 Oct. 2026.

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