Virulent
Pronunciation : Vir"u*lent
Part of Speech : a.
Etymology : [L. virulentus, fr. virus poison: cf. F. virulent. See Virus.]
Definition : 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.
Source : Webster's Unabridged Dictionary, 1913