[{"Bold_text": "adjective", "List Items": ["intrusive or presumptuous, as persons or their actions; insolently rude; uncivil:a brash, impertinent youth.Synonyms: brazen , pert , saucy , officious , insulting , bold , fresh Antonyms: polite", "not pertinent or relevant; irrelevant:an impertinent detail.", "Archaic.inappropriate, incongruous, or absurd.", "Obsolete.(of persons) trivial, silly, or absurd."]}]