英和和英

A button comes undone

undo the buttons of

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

to finger a button―fumble a button

A button is off.

to undo a button―（上衣のボタンなら）―unbutton one's coat

to undo a button―unbutton one's coat

A button fell off.

A button comes off.

fasten buttons

provide with buttons

to fasten one's coat with buttons―button one's coat

a button‐hole stitch

A button has come off

A button is off.

a buttonhole

A shoe comes unbuttoned.

to sew on a button

to sew a button on

sew a button on

at the pressing of a button

sew the button down

fasten with buttons

to sew on a button

to press a button

A button has come off.

press a button

a button on a coat

push the button down

buttons made of shell