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Definition of virulent:

  1. Extremely poisonous or venomous; very active in doing injury.
  2. Very bitter in enmity; actuated by a desire to injure; malignant; as, a virulent invective.


poisonous, sulphurous, unpleasant, astringent, red-hot, toxicant, acrimonious, biting, highly infective, resentful, venomous, unfriendly, hot, acerbic, help, pestilent, poison, caustic, stifling, acidulent, bitter, vinegarish, sharp, toxic, sulfurous, acetous, erosive, stinging, embittered, hard, destructive, harsh, attitude, pungent, acidulous, tart, deathly, acerb, acidulated, acrid, acidic, noxious, deadly, mephitical, injurious, lethal, mortal, cutting, vitriolic, pestilential, blistering, acid, pernicious, irate, sour, savage, blistery, love, mephitic, sultry, mordant.

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