insidious
/ɪnˈsɪdiəs/📚 12697 1六级托福Something that is insidious is unpleasant or dangerous and develops gradually without being noticed. 潜伏的; 暗中为害的
adjective [原级]<正式>潜伏的，隐袭的；阴险的，狡猾的
The changes are insidious, and will not produce a noticeable effect for 15 to 20 years.
变化是悄然发生的，15到20年间不会产生明显效果。
- insidious 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 47 Too high a price? insidious 形容词: 暗中为害的
in (里面) + sid (坐) + ious → 坐在酒吧喝酒 → 小人之交甘如饴 → 阴险的
an insidious disease 潜藏的疾病 insidious jealousy 阴险的嫉妒
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