a. very destructive; tending to cause death or serious injury; deadly
Crack cocaine has had a pernicious effect on urban society: it has destroyed families, turned children into drug dealers, and increased the spread of violent crimes.
Sentence in Classic:
Sviazhsky began talking of Levin, describing his strange view that machinery is simply pernicious in its effects on Russian agriculture.
Anna Karenina(V2) By Leo Tolstoy Context
That, perhaps, in short, this Prerogative Office of the diocese of Canterbury was altogether such a pestilent job, and such a pernicious absurdity, that but for its being squeezed away in a corner of St.
David Copperfield By Charles Dickens Context
And there can be no more effectual means for checking calumny than by affording ample facilities for impeachment, which is as useful in a commonwealth as the other is pernicious.
Discourses on the First Decade of Titus Livius By Niccolo Machiavelli Context