na serio in Polish dictionary na serio Meanings and definitions of "na serio" serio, na poważnie, bez żartów, śmiertelnie poważnie more Synonyms of "na serio" in Polish dictionary serio, poważnie are the top synonyms of "na serio" in the Polish thesaurus. serio · poważnie more Sample sentences with "na serio" Declension Stem Match words all exact any Try again Available translations English German Russian Authors