This is the 11583rd most frequent German word.
strafanzeigen
To file a criminal complaint.
Here, 'strafanzeigen' is used in a legal sense, meaning to file or press charges against someone.
Ich habe der Polizei gesagt, dass ich jemanden strafanzeigen werde.
I told the police that I would press charges against someone.
In this sentence, 'Strafanzeige' is the noun form, referring to a formal criminal complaint.
Die Frau entschied sich dazu, keine Strafanzeige zu stellen.
The woman decided not to file a criminal complaint.
'strafanzeigen' is being discussed as a verb, inquiring about the formal process of doing so.