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.
例文
1. I did what I could,but her mother 's influence was pernicious .
私は尽力しましたが、彼女の母は非常に深刻な被害を受けています。
2.The principle had been pernicious from beginning to end.
この原則は最初から最後まで有害である。
3.Business may be troublesome，but idleness is pernicious .
事業は人をかき乱すが、怠惰害はもっと大きい。
4.They don 't really，in their ivory towers，understand how pernicious drug crime is.
彼らは象牙の塔の中にいて、麻薬犯罪の被害がどれほど大きいかを本当に理解していない。
5.There is a pernicious culture of excellence：everything has to be not merely good but the best.