Definition of pestilent:
nettlesome, epidemic, irritating, bothersome, venomous, annoying, perversive, baneful, harmful, pesky, virulent, pernicious, plaguy, pestering, vexatious, dirty, pestiferous, subtle, help, noxious, baleful, mortal, corruptive, teasing, deadly, plaguelike, insidious, deathly, plaguey, pestilential, lethal, vexing, galling.
- diseased (part of speech: adjective)
- unhealthy (part of speech: adjective)
It had faded from my sight, had grown flat as a dogma, uninteresting as " a foul and pestilent congregation of vapours;" the moon had been but a round thing with the sun shining upon it, and the stars were only minding their own business.- "The Seaboard Parish, Complete", George MacDonald.
The Countess might have some confederate among them- this pestilent English General, perhaps, who had made himself so conspicuous in her defence; or some one of them might throw light upon her movements, upon her conduct during the journey.- "The Rome Express", Arthur Griffiths.
- "Maximina", Armando Palacio Valdés.