Examples of using "Aufzumachen" in a sentence and their english translations:
Tom didn't dare to open his mouth.
I never had the courage to open it.
He didn't dare to open his mouth.
Tom tried to open the door, but couldn't.
I tried in vain to open it.
It's not warm enough to open the window.
If you were to ask your banker where he invests his money, you would also have to ask your dentist to open his mouth so you could examine his teeth.