一表示否定的前缀1dis加在名词形容词动词之前例词disadvantage缺点dishonorable不光彩的disagree不同意2in加在形容词名词之前例词incorrect不正确的inability无能无力inaccurate不准确的3im加在字母mbp之前例词impossible不顺能的impolite不礼貌的impudence厚颜无耻4il加在以1开头的词前例词illegal非法的illiterate文盲的无文化的illogical不合逻辑的5ir加在以r开头的词前例词irregular不稳定的irresistable不可抵抗的irresolvable不能分解的不解决的6un加在名词形容词副词之前例词unfinished未完成的undoubted无疑的unemployment失业7non加在形容词名词前例词nonexistence不存在nonessential不主要的nonelectrical非电的8mis加在动词名词之前例词misunderstand误解misjudge误判misleading误导misfortune不幸9dis加地动词之前例词disappear消失disa