History and Etymology
Middle English
complexioun "(of substances, parts of the body, or persons) constitution or nature resulting from a combination of the four humors, healthy disposition, facial color taken as indicating the proportion of humors, (in general) constitution, nature," borrowed from Anglo-French & Medieval Latin; Anglo-French
complexion, complection "humor, combination of humors, physical constitution or nature, facial color" borrowed from Medieval Latin
complexiōn-, complexiō "combination of humors or other elements, constitution, temperament," going back to Latin, "action of circling, combination, collection," from
complector, complectī "to embrace, grasp, encompass, include" +
-tiōn-, -tiō, suffix of verb