前缀de-来自于拉丁语,本意是“away from”(离开,远离”,表示与原位置或者原来的形式和状态的分离。
所以前缀de-表示:
“离开”,“去除”,“否定” ,“向下”、“降低”等
1、表示“离开”、“除去”、“否定”,“取消” ,“向下”等

de-cline(下滑,衰退),/dɪˈklaɪn/
detrain(下车),/ˌdiːˈtreɪn/
de-scend(下降),/dɪˈsend/
de-celerate(减速),/ˌdiːˈseləreɪt/
de-crease(减少),/dɪˈkriːs/

de-part(出发,启程),/dɪˈpɑːt/
de-vorce(离婚),/dɪˈvɔːs/
de-throne(废黜),/diːˈθrəʊn/
de-plane(下飞机)/diːˈpleɪn/
de-port(驱逐出境),/dɪˈpɔːt/
de-rail"(脱轨),/diːˈreɪl/
de-tain(扣留),/dɪˈteɪn
de-code(解码),/diːˈkəʊd/
de-colour(去色、掉色),/diːˈkʌlə(r)/
de-press(压制,压抑),/dɪˈpres/
de-value"(贬值),/ˌdiːˈvæljuː/
de-fect(背叛),/ˈdiːfekt/
de-spise(鄙视),/dɪˈspaɪz/
de-forest(砍伐森林),/ˌdiːˈfɒrɪst/
"de-compose"(分解),/ˌdiːkəmˈpəʊz/
"de-colonize",/ˌdiːˈkɒlənaɪz/
de-ny(否认),/dɪˈnaɪ/
de-centralize(权力下放),/ˌdiːˈsentrəlaɪz/
de-liver(传递),/dɪˈlɪvə(r)/
de-lay(延期),/dɪˈleɪ/
de-activate (释放,去活化),/diːˈæktɪveɪt/
de-active(使不活动),/diˈæktɪv/
de-control(解除控制),/ˌdiːkənˈtrəʊl/
de-face(丑化),/dɪˈfeɪs/
de-fame(诽谤),/dɪˈfeɪm/
de-forest(砍伐森林),/ˌdiːˈfɒrɪst/
de-centralize((权力;人口)分散),/ˌdiːˈsentrəlaɪz/
de-compose(分解),/ˌdiːkəmˈpəʊz/
de-materialize(非物质化),/ˌdiːməˈtɪəriəlaɪz/
de-militarize(非军事化),/diːˈmɪlɪtəraɪz/
de-mobilize(复员),diːˈməʊbəlaɪz/
de-class(降低社会地位),/diːˈklɑːs/
de-population(人口减少),/ˌdiːˌpɒpjuˈleɪʃn/
de-ice(除冰),/ˌdiːˈaɪs/
de-identity(去标识化),/di aɪˈdentɪfaɪ/
de-incriminate(免除嫌疑),/di ɪnˈkrɪmɪneɪt/
de-ceive(欺骗),/dɪˈsiːv/
de-compress(使减压)/ˌdiːkəmˈpres/
de-cry(责难)/dɪˈkraɪ/

2、表示“使…成为”或“加强”的意思
如:de-press(使沮丧),/dɪˈpres/
de-sign(设计),/dɪˈzaɪn/
de-fine(定义),/dɪˈfaɪn/
de-velop(发展、开发),/dɪˈveləp/
de-cide(决定),/dɪˈsaɪd/
de-vote(献身),/dɪˈvəʊt/
de-clare(宣布),/dɪˈkleə(r)/
de-bit(借款),/ˈdebɪt/
de-corate(装饰),/ˈdekəreɪt/
de-fence(防御),/dɪˈfens/
de-feat(击败),/dɪˈfiːt/
de-note(标志),/dɪˈnəʊt/
de-serve(值得),/dɪˈzɜːv/
