calidus

From caleō (“I am warm or hot; glow”) +‎ -idus.

• caldus (Vulgar or Late Latin, Appendix Probi)

• (Classical Latin) IPA^(key): /ˈka.li.dus/, [ˈkälʲɪd̪ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈka.li.dus/, [ˈkäːlid̪us]

calidus (feminine calida, neuter calidum, comparative calidior, superlative calidissimus); first/second-declension adjective

1. (literary) warm, hot

   Synonyms: (informal) caldus, (archaic) formus

   Antonym: frigidus

2. fiery, fierce, vehement
3. spirited, impassioned
4. rash, eager, inconsiderate
5. (rare) having a white spot on the forehead

• In the sense "hot water", the syncopated form calda is particularly common. Emperor Augustus "corrects [his grandson Gaius Caesar] for saying calidam rather than caldam, not because it's not Latin, but because it's annoying and, as he himself puts it in Greek, περίεργον (períergon, “affected, overdone”)".^[1]
• The form with -i- is completely absent from the surviving fragments of Petronius' Satyricon as inappropriate for representing informal speech, at least in the literal meaning.^[2]

First/second-declension adjective.

• frīgidus, frī̆gdus

• callidus

• “calidus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “calidus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• calidus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• calidus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.