pernicious

英 [p?'n???s] 美[p?'n???s]
  • adj. 有害的；惡性的；致命的；險(xiǎn)惡的

英英釋意

1. exceedingly harmful
2. working or spreading in a hidden and usually injurious way;
"glaucoma is an insidious disease"
"a subtle poison"