"deficient" in German deficient Defizient unzulänglich mangelhaft Detailed translations for "deficient" deficient 1. mathematics deficient der Defizient{masculine} 2. other deficient(also: inadequate, deficiently) unzulänglich And if it's so deficient that you need to get your kicks elsewhere, then we really have a problem. Source: opensubtitles.org Corpus by OPUS Request review Wenn das so unzulänglich ist, dass du dir deine Kicks woanders holst, dann haben wir wirklich ein deficient mangelhaft{adjectiv} English synonyms for "deficient" deficient {a} insufficient deficient {s} inferior lacking(p) substandard wanting(p)