unverbesserlich

== German == === Etymology === un- +‎ verbessern +‎ -lich === Pronunciation === === Adjective === unverbesserlich (strong nominative masculine singular unverbesserlicher, comparative unverbesserlicher, superlative am unverbesserlichsten) unimprovable; which cannot be improved incorrigible (unimprovable because any correction is impossible) (less common) perfect (unimprovable because something is its theoretical best) (informal) diehard ==== Declension ==== === Further reading === “unverbesserlich” in Duden online