Inquiry

Abfrage

(the act of inquiring (by asking questions, etc))

Anfrage

(the act of inquiring (by asking questions, etc))

Erforschung

(research; investigation)

Erkundigung

(the act of inquiring (by asking questions, etc))

Erkundung

(research; investigation)

Nachforschung

(research; investigation)

Recherche

(research; investigation)

Untersuchung

(research; investigation)