insidious

/ɪnˈsɪdiəs/📚 12692 58 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。

-sid- sid / sed = sit,表示“坐”insidious adj. 阴险的(in 内+sid+ious→坐在内部的[坏人] →阴险的)
insidious 出现在下面的课文中
Lesson 47 Too high a price? insidious 形容词: 暗中为害的

an insidious disease 潜藏的疾病 insidious jealousy 阴险的嫉妒

单词造句: