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一、常见的前缀 1. 表示否定意义的前缀 1) 纯否定前缀 a-, an-, asymmetryanhydrous dis- dishonest, dislike in-, ig-, il, im, ir, incapable, inability, ignoble, impossible, immoral, illegal, irregular ne-, n-, none, neither, never non-, noesense neg-, neglect un- unable, unemployment 2) 表示错误的意义 male-, mal-, malfunction, maladjustment mis-, mistake, mislead pseudo-, pseudonym, pseudoscience 3)表示反动作的意思 de-, defend, demodulation dis-, disarm, disconnect un-, unload, uncover 4)表示相反，相互对立意思 anti-, ant- antiknock, antiforeign, contra-, contre-, contro-, contradiction, controflow counter-, counterreaction, counterbalance ob-, oc-, of-, op-, object, oppose, occupy with-, withdraw, withstand 2. 表示空间位置，方向关系的前缀 1)a- 表示在之上，向aboard, aside, 2)by- 表示附近，邻近，边侧bypath, bypass 3)circum-, circu-, 表示周围，环绕，回转circumstance, circuit | 
