1. 扣,扣紧钮扣：but for 倘没有,要不是 | button up 扣,扣紧钮扣 | buy off 收买

2. 扣住：button up one's mouth 保持沉默 | button up 扣住 | button 按钮

3. 扣紧：button switch 按钮开关 | button up 扣紧 | button 钮扣;按钮;金属镶齿;扣上

4. 扣好纽扣：
06) Put on your clothes. 穿好衣服. |
07) Button up. 扣好纽扣 |
08) Get dressed. 穿好衣服.

1. -> see button 2

verb

1. refuse to talk or stop talking
    fall silent

    e.g. The children shut up when their father approached

    Synonym: close upclam updummy upshut upbelt upbe quietkeep mum