打定主意 dǎdìngzhǔyi to make up one's mind Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 他用了很长时间才打定主意。 tā yòng le hěn chángshíjiān cái dǎdìng zhǔyi. It took him a long time to make up his mind. Source: UM-Corpus: Education