纽扣 (niǔ kòu): ปุ่ม

A button on my shirt fell off, and I looked for a long time but couldn't find it.

The buttons on this coat are very delicate; they are made of shell.

Please help me sew this button onto my pants, thank you!

He unbuttoned his coat and walked into the warm room.

This type of button is specially designed; it fastens automatically with one press.