- Confidence
- Established
- Formation
- Inherited
- First attested
- Plautus
- Inherited from
- Proto-Italic *kalē-
- Ultimate origin
- Proto-Indo-European (*ḱelh₁-)
Pronunciation
Forms
caleō (present infinitive calēre, perfect active caluī, future active participle calitūrus); second conjugation, no passive, no supine stem except in the future active participle[1]
Etymology
It is inherited from Proto-Italic *kalē-, inherited from Proto-Indo-European *ḱl̥h₁-eh₁- (“to be hot”), a stative verb.[2] Cognate with Welsh clyd (“warm”) and Lithuanian šil̃tas (“warm”).[2][3][4] Lewis & Short thought the origin doubtful.[5]
Earliest recorded meaning
Plautus says the water is hot.[6][2] Köbler dates Plautus c. 250–184 BC.[7]
Semantic evolution
It was to be hot or warm, and Cicero says that all living and growing things are warm.[6] It was used of a body warm with exertion or with life, of fever, and of being fired with love, hope, zeal or anger.[6] Döderlein says that calidus is moderate warmth, while fervidus is a high degree of heat.[8]
In medieval Latin it was to be or grow warm, and figuratively to live or be moved.[9] Old French chaloir “to matter” comes from it, and its negative gave English nonchalant.[1][10] English calorie comes from calor.[10]
Timeline
- c. 250–184 BC – Plautus uses it.[6][7]
- 81–43 BC – Cicero uses it of the warmth of living things.[6][7]
- 1734 – English nonchalant is recorded, from French nonchaloir “not to care”.[10]
- 1866 – English calorie is recorded, from calor.[10]
Meanings
Verb
- To be warm or hot; to glow.[6][1]
- To be warm (with exertion or with life).[6]
- To be feverish.[6]
- To be fired (with love, hope, zeal or anger).[6]
Word family
- calefaciō
- calefio
- calēscō
- calidus
- calor
- concaleō
- recaleō
Related words
- caldāmentum
- caldāria
- caldāriola
- caldārium
- caldārius
- caldor
- calefactābilis
- calefactiō
- calefactō
- calefactōrius
- English calorie
- English nonchalant
References
- ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
- ^ Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
- ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b c d e f g h i Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
- ^ Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
- ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
Related etymologies
Cite this entry
“Caleo.” Etymologically, 16 Oct. 2026, etymologically.com/la/caleo. Accessed 16 Oct. 2026.
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