1. extremely poisonous
1. The venom of the cobra is far more virulent than that of the rattlesnake.
2. bitter; fierce
2. He has a virulent hatred of electronic dance music.
virus (poison, sap of plants, slimy liquid) (Latin)
it is a virus, which causes disease and harm. So, something virulent is viral and poisonous. As dangerous and poisonous as Viru (shewag) is for the opponents