Virulent

Adjective

 * 1)  Of a disease or disease-causing agent, highly infectious, malignant, or deadly.
 * 2) Hostile to the point of being venomous; intensely acrimonious.
 * The politicians were virulent in their hatred of the president.

Related terms

 * virus
 * virulence
 * virulently

Adverbs for Virulent
disastrously; unfortunately; cruelly; bitterly; admittedly; unusually; terribly; remarkably; insidiously; unbelievably; uncommonly; highly; dreadfully; dangerously.

Thesaurus
acerb, acerbate, acerbic, acid, acidic, acidulent, acidulous, acrid, acrimonious, acute, antagonistic, antipathetic, astringent, baleful, baneful, belligerent, biting, bitter, brutal, burning, catching, caustic, choleric, clashing, colliding, communicable, conflicting, contagious, corroding, corrosive, corrupting, corruptive, counterproductive, cutting, damaging, dangerous, deadly, death-bringing, deathful, deathly, deleterious, despiteful, destructive, detrimental, disadvantageous, disserviceable, distressing, double-edged, drastic, edged, embittered, envenomed, escharotic, excessive, exorbitant, extravagant, extreme, fatal, feral, fierce, full of hate, furious, great, harmful, harsh, hateful, hostile, hurtful, immoderate, incisive, infectious, infective, injurious, intemperate, intense, internecine, keen, killing, lethal, malefic, malevolent, malicious, malign, malignant, mephitic, miasmal, miasmatic, miasmic, mischievous, mordacious, mordant, mortal, nasty, noisome, noxious, ominous, outrageous, penetrating, pernicious, pestiferous, pestilential, piercing, poignant, poison, poisonous, prejudicial, quarrelsome, rancorous, rankled, repugnant, resentful, resenting, rigorous, rough, sarcastic, savage, scatheful, scathing, septic, set against, severe, sharp, sore, spiteful, splenetic, splitting, stabbing, stewing, stinging, strident, stringent, tart, tough, toxic, toxicant, toxiferous, trenchant, unconscionable, unfriendly, unhealthy, unwholesome, vehement, venenate, veneniferous, venenous, venomous, vicious, violent, vitriolic

Etymology
From virus "poison, slime, venom".

Translations

 * Catalan: virulent
 * French: virulent

Adjective

 * 1)  virulent
 * 2) virulent hostile