öffnen

Etymology
From, from , from , from. Compare 🇨🇬 and 🇨🇬.

Verb

 * 1)  to open to make something accessible or allow for passage by moving from a shut position
 * 2)  to open to make accessible to customers or clients
 * 3)  to open to load into memory for viewing or editing
 * 4)  to open, get, or answer the door
 * 5)  to open to become open
 * 6)  to open up (to), confide (in) to reveal oneself; share personal information about oneself
 * 1)  to open up (to), confide (in) to reveal oneself; share personal information about oneself

Usage notes
While öffnen isn't explicitly formal, it is fairly infrequent in everyday spoken language, typically replaced by the colloquial.