Virulent
adjective
extremely poisonous or injurious; producing venom
“venomous snakes”
Similar: deadly, venomous
adjective
infectious; having the ability to cause disease
adjective
harsh or corrosive in tone
“an acerbic tone piercing otherwise flowery prose”
Similar: acerb, acerbic, acid, acrid, bitter, blistering
Word family
virulently