The term SERVING NO USEFUL PURPOSE can be summarized by two crossword solutions: OTIOSE (6 letters) and POINTLESS (9 letters). OTIOSE is an adjective meaning 'lazy or idle' and is derived from the Latin word otium, which means 'LEISURE'. POINTLESS is an adjective meaning 'having no purpose or result' and is derived from the Middle English word pointeles, which means 'without a point'. Both words describe something that is not useful or productive.