毒瘾 dúyǐn drug addiction Origin Definitions Defs Strokes Stroke Words Sentences Sents 毒 dú nounverb narcotics illegal drug; narcotic; drug used for non-medical purposes瘾 癮 yǐn noun addiction An uncontrollable craving, habit, or dependence formed through long-term exposure to a substance or activity; a strong passion or interest.