"root cause" in German root cause Hauptursache Hauptgrund Grundursache Detailed translations for "root cause" root cause root cause(also: chief cause, main cause) die Hauptursache{feminine} I think the root cause is criminals. Source: opensubtitles.org Corpus by OPUS Request review Die Hauptursache sind Kriminelle. root cause(also: main reason) der Hauptgrund{masculine} root cause die Grundursache{feminine}