virulent
adjective uk/ˈvɪr.ə.lənt/ us/ˈvɪr.jə.lənt/
剧毒的;致命的
A virulent disease or poison is dangerous and spreads or affects people very quickly.
A particularly virulent strain of flu has recently claimed a number of lives in the region. 一场有致命杀伤力的流感最近在这个地区夺去了许多人的生命。
formal恶毒的，狠毒的
full of hate and violent opposition
She is a virulent critic of US energy policy. 她是美国能源政策尖刻的批评者。