Sanguine

SANG-gwin

(adjective) Optimistic or positive, especially in a difficult situation; in historical medicine, having the warm, ruddy complexion associated with a cheerful temperament; also, blood-red in color.

Despite the forecast calling for one last cold snap, she remained sanguine about spring's arrival — the robins had appeared, the crocuses were up, and in her experience, those two things were never wrong.

🌍 Word Origin: From Latin "sanguineus," meaning "of blood, bloody, blood-red," derived from "sanguis" (blood). The optimistic meaning comes from medieval humoral theory, which held that a person dominated by blood among the four bodily humors would be warm, ruddy, cheerful, and confident. The word entered English in the 14th century carrying both the color meaning and the temperament meaning simultaneously.

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💡 Fun Fact: Medieval physicians believed the human body was governed by four fluids called humors — blood, phlegm, yellow bile, and black bile — and that a person's personality was determined by whichever humor dominated. A sanguine person had too much blood, making them cheerful and optimistic; a phlegmatic person was calm and slow; a choleric person was irritable; and a melancholic person was sad. Though humoral theory was entirely wrong medically, it left a remarkable linguistic legacy — sanguine, phlegmatic, choleric, and melancholic all survive as personality descriptors today, making every use of these words an inadvertent tribute to a medical system abandoned four centuries ago.