“heat” in Latin

(A) (A) PROPR., calor (warmth in a higher or milder degree; opposed to frigus): ardor (burning heat, the heat of a fiery or burning body; also, fire itself): fervor (heat in a still higher degree, to the point when it makes itself known by hissing and roaring, as in red-hot metal, boiling liquids): aestus (the highest degree of heat, where the whole mass really, or, as it were, is agitated and roars; especially, also, of internal heat, in fevers, etc., which makes itself known by restlessness and violent motion). All these words are used by the Latins also in the plur., in order to bring forward more prominently the duration and vehemence of the heat. The heat of the sun, ardor or ardores solis; aestus solis: the heat increases, calor or aestus increscit: the heat abates, aestus minuit; calor se frangit: the heat abates much, multum ex calore decrescit. (B) FIG., (a) Great vivacity, vehemence, impetus: ardor: fervor (for difference, Vid: above; all three, also, with animi, when the subject is of violence of disposition): youthful heat, ardor juvenilis; ardor or fervor aetatis. In the first heat; e.g., of the battle, primo pugnae impetu (Liv., 6, 13). (b) Anger, etc. ira: impetus et ira: iracundia: to kill anybody in the heat of passion, impetu et ira aliquem occidere.

TRANS., calefacere (PROP. and figuratively): feryefacere (PROP., to make hot by boiling): incendere: inflammare (to excite, figuratively). To heat very much, percalefacere (PROP.): to heat one’s self, confervescere (PROP.; figuratively only with the poets); calefieri (PROP.; e.g., by running): to be heated with wine, incalescere vino. To order the bath to be heated, balneum calefieri jubere. INTRANS., concalescere (especially of corn, frumenta).