脱咖啡因 tuōkāfēiyīn decaffeinated Origin Definitions Defs Strokes Stroke Words Sentences Sents 脱 脫 tuō verbadjective to remove to extract or eliminate a substance (e.g. dehydration, degreasing)咖啡因 kāfēiyīn noun caffeine caffeine; a bitter white alkaloid found in coffee, tea, and cocoa, used as a stimulant and diuretic