verschwunden
gone / disappeared
No longer present or findable; lost or gone.
Mein Schlüssel ist spurlos verschwunden, ich kann ihn nirgends finden.
My key has disappeared without a trace; I can't find it anywhere.

gone / disappeared
Loading your saved state.
gone / disappeared
No longer present or findable; lost or gone.
Mein Schlüssel ist spurlos verschwunden, ich kann ihn nirgends finden.
My key has disappeared without a trace; I can't find it anywhere.

'Verschwunden' (gone / disappeared) is the past participle of the verb 'verschwinden' (to disappear). It is very often used like a normal adjective to describe a state.
Das Auto ist über Nacht einfach verschwunden.
The car simply disappeared overnight.
Since 'verschwunden' (gone / disappeared) comes from the verb 'verschwinden' (to disappear), which describes a change of state, it is always combined with the auxiliary verb 'sein' (to be). So you say 'er ist verschwunden' (he has disappeared) or 'sie war verschwunden' (she had disappeared / she was gone).
Als ich zurückkam, war meine Tasche verschwunden.
When I came back, my bag was gone.
Common adverbs that intensify 'verschwunden' (gone / disappeared) are 'spurlos' (without leaving a trace), 'plötzlich' (suddenly), or the idiom 'vom Erdboden verschwunden' (vanished from the face of the earth).
Der Dieb war spurlos mit dem Geld verschwunden.
The thief had disappeared without a trace with the money.
away / forth
'fort' and 'verschwunden' can both mean that someone or something is no longer there. 'fort' usually just says: the person or thing is gone. It does not explain why. 'verschwunden' sounds stronger. It is especially appropriate when you cannot find something or when it is unclear where someone or something has gone. For normal leaving, 'fort' can sound more natural. When you are searching or surprised, 'verschwunden' fits better.

Mein Schlüssel ist verschwunden, obwohl er eben noch auf dem Tisch lag.
My key has disappeared, even though it was just on the table.
Nach dem Frühstück war Paul schon fort.
After breakfast, Paul was already gone.