优境学 yōujìngxué euthenics Origin Definitions Defs Strokes Stroke Words Sentences Sents 优 優 yōu adjectivenoun excellent (bound form) excellent; superior; of high quality; the opposite of 劣 liè境 jìng noun circumstances (bound form) condition; situation; circumstances学 學 xué nounaffix branch of learning (bound form) a subject or branch of study; often used as a suffix for -logy, -ics, or -science