Pestilent
From BiblePortal Wikipedia
King James Dictionary [1]
Pest'Ilent, a. L. pestilens, from pestis, plague.
1. Producing the plague, or other malignant, contagious disease noxious to health and life as a pestilent air or climate. 2. Mischievous noxious to morals or society destructive in a general sense as pestilent books. 3. Troublesome mischievous making disturbance corrupt as a pestilent fellow. Acts 24
Webster's Dictionary [2]
(a.) Pestilential; noxious; pernicious; mischievous.