懒惰兼无能的警官令公众失望。Lazy and incompetent police officers are letting the public down.他是个无能的政客.He was an inept politician.无能的经营管理断送了公司.Incapable management ruined the company....

“无能的”的英语可以翻译为：incompetent，inefficient，[法] inept，impuissant，shiftless ...