Meaning: Bitterly hostile, extremely severe or harmful in its effects (of a disease or poison).
Synonyms: Vitriolic, malicious, malevolent, hostile, spiteful, venomous, vicious, vindictive, bitter, sharp, rancorous, acrimonious, scathing, caustic, withering, nasty, savage, harsh.
In Hindi: विषैला, द्रोही
Use: Local law authorities investigated Mitchell after she was suspected of stealing a virulent disease that could kill millions of people.
The infant did not survive the virulent spider bite.