early 15c., from Middle French pernicios (13c., Modern French pernicieux) and directly from Latin perniciosus "destructive," from pernicies "destruction, death, ruin," from per- "completely" (see per) + necis "violent death, murder," related to necare "to kill," nocere "to hurt, injure, harm," noxa "harm, injury" (see noxious). Related: Perniciously; perniciousness.
实用例句
1. I did what I could, but her mother's influence was pernicious.
我已尽力了，但是她母亲贻害颇深。来自柯林斯例句
2. The principle had been pernicious from beginning to end.
这条原则自始至终都是有害的.来自《简明英汉词典》
3. Business may be troublesome, but idleness is pernicious.
事业虽扰人, 怠惰害更大.来自《简明英汉词典》
4. They don't really, in their ivory towers, understand how pernicious drug crime is.
他们身处象牙塔中，并不真正了解毒品犯罪的危害有多大。来自柯林斯例句
5. There is a pernicious culture of excellence: everything has to be not merely good but the best.
