derailKK [dɪˋrel] /dɪˈɹeɪl/發音de- 向下、除去+rail 鐵軌→脫離鐵軌展開收合de-字首向下、除去rail單字鐵軌字面:脫離鐵軌火車離開鐵軌,引申為使計畫或話題脫離正軌、被打亂。動詞1使脫軌、使出軌A fallen tree derailed the freight train near the tunnel.一棵倒下的樹使貨運列車在隧道附近脫軌。2打亂、破壞、阻礙The scandal completely derailed his campaign for mayor.那樁醜聞徹底打亂了他競選市長的計畫。3脫軌、出軌The last two carriages derailed but nobody was hurt.最後兩節車廂脫軌,但沒有人受傷。4使離題、扯開話題One rude comment derailed the whole discussion.一句不禮貌的話就讓整場討論完全離題。