义务 yìwù HSK4 duty Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: volunteer All meanings 18 yìwù 18 duty 17volunteer 1 1 sentence for 义务 (yìwù — volunteer) 他经常在周末参加义务劳动。 tā jīngcháng zài zhōumò cānjiā yìwù láodòng. He often participates in voluntary labor on weekends. Source: Dong Chinese Dictionary