automatisch
automatic
Moving or functioning by itself, without human intervention or control, as with a machine.
Die Tür des Supermarktes öffnet sich automatisch, wenn man sich nähert.
The supermarket door opens automatically when you approach.

automatic
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automatic
Moving or functioning by itself, without human intervention or control, as with a machine.
Die Tür des Supermarktes öffnet sich automatisch, wenn man sich nähert.
The supermarket door opens automatically when you approach.

The adjective 'automatisch' (automatic) belongs to the word family of 'der Automat' (machine/vending machine). The ending '-isch' is a typical ending for adjectives formed from nouns.
Viele Fabriken haben eine automatische Produktionslinie.
Many factories have an automatic production line.
'Automatisch' (automatically) is very often used as an adverb to modify a verb. It then describes that an action happens by itself or without thinking.
Das Licht im Flur geht automatisch an.
The light in the hallway turns on automatically.
You can tell from context whether a technical or a human action is meant. If 'automatisch' (automatic/automatically) refers to a machine or device, it is about technology. If it refers to a person, it usually means a reflex-like reaction.
Die Kamera stellt die Schärfe automatisch ein.
The camera adjusts the focus automatically.
In a technical context, 'automatisch' (automatic) is often combined with devices and systems. Typical examples are: automatic door, automatic transmission, automatic email reply, or automatic saving.
Mein E-Mail-Programm sendet eine automatische Antwort, wenn ich im Urlaub bin.
My email program sends an automatic reply when I am on vacation.
When it is about unconscious actions, 'automatisch' (automatically) often appears with verbs of reaction. Typical phrases are: to react automatically, to act automatically, or to make an automatic movement.
Als der Ball auf ihn zuflog, hob er automatisch die Hände.
When the ball flew toward him, he automatically raised his hands.
hand
'von Hand' and 'automatisch' are opposites when it comes to the way an action is carried out. 'von Hand' means that a person does something themselves, without a machine or automatic function. 'automatisch' means that something happens by itself through a machine or a system. This contrast is especially important with devices, doors, programs, or work steps. When a person is actively doing the work, 'von Hand' fits. When the technology works by itself, 'automatisch' fits.

Die Tür öffnet sich automatisch, sobald jemand davorsteht.
The door opens automatically as soon as someone is standing in front of it.
Mein Bruder spült die empfindlichen Gläser lieber von Hand.
My brother prefers to wash the delicate glasses by hand.