Pronunciation IPA(key): [ˈɪmp͡fn̩] Audio:(file) Hyphenation: Imp‧fen Noun Impfen n (strong, genitive Impfens, no plural) gerund of impfen Declension More information singular, indef. ... singular indef. def. noun nominative ein das Impfen genitive eines des Impfens dative einem dem Impfen accusative ein das Impfen Close Declension of Impfen [sg-only, neuter, strong]