Definition of virulent:
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.
- malevolent (part of speech: adjective)
- "The History of Peru", Henry S. Beebe.
- "Peter and Wendy", James Matthew Barrie.
- "The Plunderer", Roy Norton.