/ˌɪnɪˈfɪʃnt ||; ˌɪnəˈfɪʃənt/adj not working or producing results in the best way, so that time or money is wasted 低效率的: Our heating system is very old and extremely inefficient. 我们的暖气设备非常陈旧，根本不管用。an inefficient secretary 不称职的秘书 [OPP] efficient 反义词为efficient➔inefficiency /-ənsi ||; -ənsɪ/ noun [U] ➔inefficiently adv