di-,dif-, dis-：away，negative否定，分开，不
distrust. v. 不信任, 怀疑
E.g.What he saw there left him with a profound distrust of all political authority.
他在那儿的所见让他对一切政治当局产生了一种深深的不信任感。
disassemble v. 拆开
E.g.We had to completely disassemble the engine to find the problem.
我们只好把发动机全部拆开以寻找故障原因。
differentiate v.区分
E.g.A child may not differentiate between his imagination and the real world.
儿童可能无法将自己的幻想与真实世界区分开来。
3. il-：(加在以“l”开头的词前)表示“不”
illiterate n. 文盲;
E.g.Many senior managers are technologically illiterate.
许多高级经理都对技术知之甚少。
illegitimate a. 非法的
E.g.The election was dismissed as illegitimate by the opposition.
反对党以不合法为由拒绝接受选举结果。
