vir·u·lent /-lənt/
  (a.)劇毒的,致命的,刻毒的,惡毒的,惡性的,有病毒的,充滿敵意的
  vir·u·lent /-lənt/ 形容詞
  劇毒的,致命的,惡性的,有毒力的
  Vir·u·lent a.
  1. Extremely poisonous or venomous; very active in doing injury.
     A contagious disorder rendered more virulent by uncleanness.   --Sir W. Scott.
  2. Very bitter in enmity; actuated by a desire to injure; malignant; as, a virulent invective.
  ◄ ►
  virulent
       adj 1: extremely poisonous or injurious; producing venom; "venomous
              snakes"; "a virulent insect bite" [syn: deadly, venomous]
       2: infectious; having the ability to cause disease [ant: avirulent]
       3: harsh or corrosive in tone; "an acerbic tone piercing
          otherwise flowery prose"; "a barrage of acid comments";
          "her acrid remarks make her many enemies"; "bitter words";
          "blistering criticism"; "caustic jokes about political
          assassination, talk-show hosts and medical ethics"; "a
          sulfurous denunciation" [syn: acerb, acerbic, acid,
          acrid, bitter, blistering, caustic, sulfurous, sulphurous,
           venomous, vitriolic]