英和和英

to sew on a button

to sew a button on

undo the buttons of

A button comes off.

A button comes undone

at the pressing of a button

to press a button

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

to undo a button―unbutton one's coat

sew a button on

fasten buttons

provide with buttons

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

A button is off.

A button fell off.

press a button

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

to press the button

fasten with buttons

A shoe comes unbuttoned.

to finger a button―fumble a button

to sew on a button

A button has come off

A button is off.

sew the button down

push the button down

A button has come off.

Click the button

a button‐hole stitch

he gave the button a press