King James Bible Dictionary

PEST'ILENT, adjective [Latin 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 24:5.

PESTILEN'TIAL, adjective Partaking of the nature of the plague or other infectious disease; as a pestilential fever.

1. Producing or tending to produce infectious disease; as pestilential vapors.

2. Mischievous; destructive; pernicious.

PEST'ILENTLY, adverb Mischievously; destructively.