Jealous和zealous(狂热的)是同源的,或者说jealousy这个词本身就来源于zeal(狂热)的词意发散扩展。 因为特别狂热,所以就会嫉妒。 比如说你特别狂热地喜欢你的女神,但是你的女神跟别人好了,你的zeal就会转换成嫉妒和敌意,嫉妒和愤怒别人能跟你的女神谈恋爱。 More @Wikipedia
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