adj (fml derog 文, 贬) spreading or acting gradually and unnoticed but with harmful effects 隐伏的; 潜在的; 暗中为害的
*an insidious disease 潜伏的疾病
* insidious jealousy 暗暗产生的忌妒.
[Date: 1500-1600; Language: Latin;Origin: insidiosus, from insidiae 'attack from a hiding-place', from insidere 'to sit on, lie in wait', from sedere 'to sit']
an insidious change or problem spreads gradually without being noticed, and causes serious harm
an insidious trend towards censorship of the press
1. The impostor will not get away with his insidious wiles. 这个骗子的奸计不会得逞。
2. However, there is an even more insidious kind of pollution that particularly affects urban areas and invades our daily lives, and that is noise. 但是，还有一种更加隐蔽有害的污染，它专门影响城镇地区，侵袭我们的日常生活，那就是噪音。