inefficientWiktionary 原文中文来自 ECDICTadj.无效率的，无能的构词拆分in-前缀in, into, towards, within.+efficient词根/词干词源说明From in- + efficient.释义（英文）形容词 AdjectiveNot efficient; not producing the effect intended or desired; inefficacious.Incapable of, or indisposed to, effective action; habitually slack or unproductive; effecting