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Definition of pestiferous:

  1. Noxious to peace, to morals, or to society; vicious; hurtful; destructive; as, a pestiferous demagogue.
  2. Pest- bearing; pestilential; noxious to health; malignant; infectious; contagious; as, pestiferous bodies.


irritative, bothersome, galling, bad, mocking, harmful, unsportsmanlike, foul, injurious, filthy, irritable, exasperating, peckish, perversive, corruptive, ruinous, unhealthy, testy, contaminating, unhealthful, pestering, painful, dingy, plaguy, annoying, peevish, destructive, muddy, irritating, marked-up, sordid, deleterious, cranky, insalubrious, infuriating, noxious, unsporting, tetchy, pernicious, quizzical, plaguey, pestilent, disagreeable, muddied, scratchy, cheating, hurtful, ill-gotten, mischievous, vexing, maddening, pesky, pestilential, unwholesome, toxic, perverting, soiled, poisonous, lousy, dirty, techy, nettlesome, baneful, fractious, detrimental, unclean, noisome, teasing, pettish, vexatious, petulant, deadly, evil.

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