Pestiferous

Part of speech: adjective (a.)

1. Pest-bearing; pestilential; noxious to health; malignant; infectious; contagious; as, pestiferous bodies. "Poor, pestiferous creatures begging alms." Evelyn. "Unwholesome and pestiferous occupations." Burke.

2. Noxious to peace, to morals, or to society; vicious; hurtful; destructive; as, a pestiferous demagogue. Pestiferous reports of men very nobly held. Shak.