This is the 2229th most frequent German word.
ermittlern
"Ermittlern" is the dative plural form of "Ermittler," meaning "investigators" or "detectives" in English.
The context 'ermittlern' here is as a noun 'Ermittler', which means 'investigator' in English. It is used to describe individuals acting in a capacity to investigate something.
Die Ermittler arbeiten hart an der Aufklärung des Falles.
The investigators are working hard to solve the case.
Here, 'ermittlern' is used as a dative plural form of 'Ermittler', referring to the investigators being assisted by someone.
Sie hilft den Ermittlern bei ihrer Arbeit.
She assists the investigators in their work.
In this sentence, 'ermittlern' as the plural subject 'Ermittler' are acting as the primary agents conducting investigations.