英和和英

a button on a coat

to sew on a button

a buttonhole

A button fell off.

fasten buttons

to finger a button―fumble a button

A button comes undone―（靴のボタンなら）―A shoe comes unbuttoned.

A button comes off.

to undo a button―unbutton one's coat

A button has come off

fasten with buttons

A button is off.

Click the button

to press a button

A button comes undone

to fasten a coat with buttons―button up a coat

undo the buttons of

a button‐hole stitch

a button-shaped battery

a button for forward track skipping

a hole through which buttons are pushed

the buttons on a coat

buttons made of shell

A button has come off.

shaped like a button

cuff-studs―sleeve-links

a lock called {button lock}

a type of button of clothing called a link

The button came off.

to finger a button