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French word chaud comes from Latin caleo, and later Old French chalt (Hot.)
caleo (Latin)
(figuratively) I am aroused, warmed or inflamed.. (figuratively) I am troubled or perplexed.. (figuratively) I am yet warm, new or fresh.. (figuratively, of a place) I am eagerly sought, I am frequented.. (figuratively, of abstract things) I am carried on warmly, I am urged on zealously.. I am warm or hot, glow.
calidus (Latin)
(rare) having a white spot on the forehead. Fiery, fierce, vehement. Rash, eager, inconsiderate. Spirited, impassioned. Warm, hot.
chalt (Old French)
Hot.
chaud (French)
Hot Heat, warmth (slang) enthusiastic, willing, up. (slang) hard. (slang) horny, randy (showing interest in sexual activity). (slang) risky, dangerous, disreputable, dodgy. Warm, hot.