sanguine temperament
A term from the four temperaments theory (humorism), referring to a cheerful, optimistic, and sociable personality type. Used mainly in historical or psychological contexts.
People with a sanguine temperament are said to be sociable and optimistic.
Melancholic temperament, characterized by thoughtfulness and sadness, opposite to the light-hearted sanguine.
Phlegmatic temperament, calm and unemotional, differing from the lively sanguine.
From 多血 (taketsu, 'plethora of blood') + 質 (shitsu, 'quality, temperament'). Derived from the ancient medical theory of the four humors, where an excess of blood was thought to produce a sanguine disposition.