viper/ˈvaɪpə(r); `vaɪpɚ/ n1 any of various types of poisonous snake found in Africa, Asia and Europe 蝮蛇（有毒, 产於非洲、 亚洲、 欧洲）.2 (fig 比喻) spiteful and treacherous person 恶毒而奸诈的人.
牛津英汉双解词典