1.
단추
[
단추
/
d
a
n
-
ch
u
]
button
2.
배꼽
[
배꼽
/
b
ae
-
kk
o
p
]
belly
button
3.
버튼
[
버튼
/
b
eo
-
t
eu
n
]
button
* If you cannot hear voice, click upper play button. Thanks.