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
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
Word family
- formidus
Related words
References
- ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ 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
- ^ a b Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c d e f Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Related etymologies
Cite this entry
“Formus.” Etymologically, 23 Oct. 2026, etymologically.com/la/formus. Accessed 23 Oct. 2026.
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