virulent

adjectives

extremely poisonous or injurious; producing venom
"venomous snakes"; "a virulent insect bite"
deadly, venomous, virulent
is derived from
virulence
infectious; having the ability to cause disease
virulent
is derived from
virulency
is derived from
virulence
antonym
avirulent
is similar to
(of a microorganism) extremely infective
"a highly infective organism"
highly infective
is similar to
(of a disease) having a rapid course and violent effect
deadly
harsh or corrosive in tone
"an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"; "a vitriolic critique"
acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic
is derived from
virulency
is derived from
virulence