noun
victim, sacrifice
B1
Opfer means 'victim' or 'sacrifice'. It is a neuter noun (das Opfer) with plural identical: die Opfer. Use depends on context: a harmed person (the victim) or something offered as sacrifice. Genitive singular des Opfers; common declension patterns shown in German.
Examples
Das Opfer rief die Polizei.
The victim called the police.
Im alten Mythos brachte man oft ein Opfer, um die Götter zu besänftigen.
In the old myth people often made a sacrifice to appease the gods.
Das Opfer des Unfalls wurde ins Krankenhaus gebracht.
The victim of the accident was taken to the hospital.
Details
Mnemonics
Picture someone offering something as a sacrifice (Opfer) on an altar, or a person identified as a victim.
Opfer sounds like 'offer' (a mnemonic: an offer or sacrifice).
das — neutral: remember 'das Opfer' like an abstract noun.
Notes
Can mean 'victim' (of crime, accident) or 'sacrifice' (ritual). Plural is 'Opfer' (same as singular) with dative plural often 'Opfern'.