abgetrennt
separated
Being spatially or physically separated or isolated from something else.
Der Arbeitsbereich ist durch eine Glaswand vom Wohnzimmer abgetrennt.
The work area is separated from the living room by a glass wall.

separated / severed
Loading your saved state.
separated
Being spatially or physically separated or isolated from something else.
Der Arbeitsbereich ist durch eine Glaswand vom Wohnzimmer abgetrennt.
The work area is separated from the living room by a glass wall.

'Abgetrennt' (separated / severed) is the past participle of the separable verb 'abtrennen' (to separate / to sever). It is very often used like a normal adjective to describe the state of something that has been divided.
Der abgetrennte Bereich ist nur für Mitarbeiter zugänglich.
The separated area is accessible only to employees.
The exact meaning depends on the context. In connection with rooms or areas, it means 'separate.' In a medical or accident-related context, it means that a body part has been separated from the body.
Unsere Terrasse ist durch eine Hecke vom Nachbargrundstück abgetrennt.
Our terrace is separated from the neighboring property by a hedge.
To say what something is separated from, you use the preposition 'von' followed by the dative. The structure is: 'abgetrennt von etwas' (separated from something).
Er lebt völlig abgetrennt von der Außenwelt.
He lives completely separated from the outside world.
connected
'verbunden' and 'abgetrennt' both describe whether things have contact with each other or not. Use 'verbunden' when two things are connected, have a connection, or are technically in contact. 'abgetrennt' is the opposite: something is spatially or physically separated from something else. With devices, rooms, or parts of a whole, the difference is clear: 'verbunden' means together or connected; 'abgetrennt' means separated or isolated.

Der kleine Arbeitsbereich ist durch eine Glaswand vom Büro abgetrennt.
The small work area is separated from the office by a glass wall.
Der Drucker ist mit dem Computer verbunden.
The printer is connected to the computer.