in·suf·fi·cient /ˌɪnsəˈfɪʃənt/ a. 1. 不足的,不充分的 He had insufficient sleep. 他睡眠不足。 an insufficient market 供应不足的市场 2. 不适合的;缺乏能力的,不能胜任的 a person insufficient to discharge the duties of an office 不能胜任职务的人 An old man approached with several octavo volumes under his insufficient arms. 一个老人走上前来,双臂不胜其重地挟着几册八开本的图书。