英语常用的词根和词缀答:常用词根词缀 1.否定前缀 un- uncomfortable, unacceptable, unavoidable in- incomplete, incapable, indispensable, inevitable im- imperfect, impartial, immortal dis- disable, disadvantage mis- misplace, mislead, misfortune ab- abnormal de- deactivate, degrade il- illegal, illiterate ir- irregul...