Etymologically

Etymology and origin of the Latin word formus

Confidence
Established
Formation
Inherited
First attested
Paul the Deacon's epitome of Festus
Inherited from
Proto-Italic *xʷormos
Ultimate origin
Proto-Indo-European *gʷʰormós

Pronunciation

  • Classical: [ˈfɔr.mʊs][1]
  • Ecclesiastical: [ˈfɔr.mus][1]

Forms

formus (feminine forma, neuter formum); first/second-declension adjective[1]

Etymology

It is inherited from Proto-Italic *xʷormos, inherited from Proto-Indo-European *gʷʰormós (“warm”).[2][1] The form could go back to ⟨*gʷʰormos⟩ or ⟨*gʷʰr̥mos⟩, but since no other language shows the zero grade, de Vaan prefers the first; the root varies between ⟨*gʷʰer-⟩ and ⟨*gʷʰor-⟩, perhaps after different verbs made from it.[2]

Cognate with Sanskrit घर्म (gharmá-, “heat, glow”), Avestan garəma- (“warm; heat”), Old Armenian ջերմ (ǰerm, “warm”), Ancient Greek θερμός (thermós, “warm”), Old Prussian gorme (“heat”) and Latvian gar̂me (“warmth”), and perhaps Albanian zjarm (“heat”).[2] The OLD also compares English warm.[3]

Ancient grammarians knew it mainly as the supposed source of forceps and fornāx.[4]

Earliest recorded meaning

It was obsolete in classical times and is known only from grammarians and glossaries;[4][5] the derived formidus “warm” is quoted from Cato by Festus' epitomator.[2]

Semantic evolution

The grammarians who mention it, from Velius Longus to Isidore of Seville, do so to explain forceps and fornāx.[4][6] Later glossaries render it as calidum, “warm”.[4]

Timeline

  • 234–149 BC – Cato uses the derived formidus.[2][6]
  • first half of the 2nd century AD – The grammarian Velius Longus mentions it.[6][4]
  • c. 560–636 – Isidore of Seville mentions it.[4][6]

Meanings

Adjective

  1. (archaic) Warm, hot.[3][5][1]

Word family

  • formidus

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e 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 Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  4. ^ a b c d e f Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  5. ^ a b 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

Related etymologies

  • quis · also from Proto-Indo-European
  • cum · also from Proto-Indo-European
  • ego · also from Proto-Indo-European
  • is · also from Proto-Indo-European
  • hic · also from Proto-Indo-European
  • in · also from Proto-Indo-European
  • qui · also from Proto-Indo-European
  • et · also from Proto-Indo-European
Cite this entry

“Formus.” Etymologically, 23 Oct. 2026, etymologically.com/la/formus. Accessed 23 Oct. 2026.

Last edited on . ·