正襟危坐 zhèngjīnwēizuò sit upright Origin Definitions Defs Strokes Stroke Words Sentences Sents 1 sentence 他正襟危坐，神色俨然。 tā zhèngjīnwēizuò, shénsè yǎnrán. He sat up straight with a dignified and solemn expression. Source: Dong Chinese Dictionary