hygiene: [19] Greek hugiés meant ‘healthy’. From it were formed the noun hugíeia ‘health’ (personified as Hygieia, the Greek goddess of health) and the adjective hugieinós ‘healthful’. This came to be used as a noun, hugieiné, ‘science of healthy living’, which passed via modern Latin hygieina and French hygiène into English. [hygiene etymology, hygiene origin, 英语词源]