but·ton·hole
noun/ˈbʌtnhəʊl/
/ˈbʌtnhəʊl/
- a hole on a piece of clothing for a button to be put through

enlarge image Topics Clothes and Fashionc2纽扣孔;扣眼 - (British English) (North American English boutonnière)a flower that is worn in the buttonhole of a coat or jacket
佩戴在扣眼上的花