1. unfasten
2. undo
You cannot undo what has already been done.
I can't undo it.
The "undo" option reverts the last change done to the document.
He did not want to know, but you cannot undo knowledge.
David's mother had been developing a pill to undo the effects of the operation.
Could you help me undo the buttons?
Please undo the package.
Don't undo your bootlaces until you have seen the river.
3. belt out
Englisch Wort "odpinać"(belt out) tritt in Sätzen auf:
clothes + accessories + patterns and materials4. unhook
Englisch Wort "odpinać"(unhook) tritt in Sätzen auf:
Słówka 04-10.065. unbutton
She had to unbutton her coat because it was so hot in the bus.
Please unbutton your blouse.