纽扣niǔkòubutton (on clothing)HSK 7-9PronunciationniǔkòuExample sentence这件衬衫的纽扣掉了一颗。Zhè jiàn chènshān de niǔkòu diào le yì kē.This shirt lost one of its buttons.Read and choose an answerOne fixed sampleExplore a sample