erschießen
to shoot dead
To kill someone by firing a gun.
Der Einbrecher wurde auf der Flucht von der Polizei erschossen.
The burglar was shot dead by the police while fleeing.

to shoot dead
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to shoot dead
To kill someone by firing a gun.
Der Einbrecher wurde auf der Flucht von der Polizei erschossen.
The burglar was shot dead by the police while fleeing.

The prefix 'er-' often indicates the final, often fatal result of an action. While 'schießen' only means 'to shoot', 'erschießen' always means 'to shoot dead'.
Der Jäger schoss auf den Hirsch, aber er traf ihn nicht.
The hunter shot at the deer, but he didn't hit it.
Verbs with the prefix 'er-' are inseparable. This means the prefix always stays attached to the verb in all sentence forms and tenses.
Man fand heraus, dass der Mann erschossen wurde.
It was discovered that the man had been shot dead.
The structure of the sentence shows who the victim is. 'Jemanden erschießen' (to shoot someone dead) is transitive and means to kill another person. 'Sich erschießen' (to shoot oneself) is reflexive and means to kill oneself.
Die Polizei erschoss den Angreifer in Notwehr.
The police shot the attacker dead in self-defense.
to kill
'töten' and 'erschießen' both mean that a living being dies because someone does something. 'Töten' is the more general word and does not yet say how it happens. 'Erschießen' is more precise: it means that someone is killed by a shot from a weapon. So you use 'erschießen' when the way of killing is important. If the method is not known or not important, 'töten' fits better.

Im Krimi erschießt der Täter sein Opfer mit einer Pistole.
In the crime novel, the perpetrator shoots his victim dead with a pistol.
Giftige Abfälle im Fluss können viele Fische töten.
Toxic waste in the river can kill many fish.