frustrieren

== German == === Pronunciation === IPA(key): [fʁʊsˈtʁiːʁən] === Verb === frustrieren (weak, third-person singular present frustriert, past tense frustrierte, past participle frustriert, auxiliary haben) to frustrate ==== Conjugation ==== === Further reading === “frustrieren” in Duden online “frustrieren” in Digitales Wörterbuch der deutschen Sprache