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virulent

virulent

14 9.1
Very harmful and able to cause disease that spreads quickly
  • adjective
  • /ˈvɪrələnt/
  • Specialized
translation icon : virulento
  • The recent outbreak was attributed to a particularly virulent bacterium that spread rapidly through the population.
  • virulent strain
  • virulent subtype
  • virulent pathogen

OK, particularly virulent cholera will kill you in a day or two.

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Examples

  • 'Spanish flu', which struck in 1918, was a particularly virulent form of the disease.

    Academic text (2012)
  • For instance, the initial virus was much more virulent than the subsequent iterations of the virus.

  • This is a very virulent tumor.

  • Remember, the bug is virulent.

  • My boyfriend, Mark, was one of the first victims of the more virulent strain.

    Fiction book (1997)
  • OK, particularly virulent cholera will kill you in a day or two.

  • Rinderpest is incredibly virulent, with morbidity rates of nearly 100 percent among exposed animals.

    Academic text (2013)
  • The disease is caused by the highly virulent Phakopsora pachyrhizi fungus.

    Academic text (2006)
  • Disease reflects interactions among a susceptible host, a virulent pathogen, and environmental conditions that support the pathogen.

    Academic text (2011)
  • It can grow and reproduce inside the host cells and is one of the most virulent foodborne pathogens.

Synonyms

deadly
vsvirulent
543 2.8

Able to cause death or serious harm

emphasizes rapid infectious spread and poisonous action as well
toxic
vsvirulent
380 4.0

Containing poison that can cause harm or death

adds infectiousness and quicker, more aggressive damaging action
poisonous
vsvirulent
90 2.8

Containing a substance that can make you sick and can cause death if eaten, touched, or breathed

is broader by including rapid spread and extreme infectious harm
aggressive
vsvirulent
  • Specialized
40 5.6

A disease that spreads quickly and becomes more severe

emphasizes immediate extreme harm and poisonous potential as well
invasive
vsvirulent
  • Specialized
19 5.8

Spreading quickly into healthy tissue or nearby areas

covers that spread but also highlights acute harmful or toxic effect
highly contagious
vsvirulent
9 3.4

A disease that spreads very easily between people

is similar but also stresses high harm and rapid damage
pathogenic
vsvirulent
  • Specialized
5 7.0

Able to cause disease in people, animals or plants

adds greater speed and severe damaging or poisonous effect
infective
vsvirulent
  • Specialized
1 7.4

Able to make people sick and spread disease

includes that but also stresses extreme harm and rapid damage
toxigenic
vsvirulent
  • Specialized
1 8.1

Able to make poisons that can harm people or animals

includes toxin production but also focuses on fast overall damage
highly infective
vsvirulent
  • Specialized
5.6

Very likely to make people sick

is broader, adding extreme poisonous harm and rapid damaging effect
pestilent
vsvirulent
  • Specialized
9.9

Likely to cause a serious illness that spreads quickly

focuses more on acute harm and fast damaging effects
pestiferous
vsvirulent
  • Literature
9.9

Likely to spread disease

adds stronger harm and faster destructive or poisonous action

Antonyms

231 1.0

Not able to hurt people or things

noninfectious
  • Specialized
1 4.6

Not able to spread disease between people

avirulent
  • Specialized
9.0

Not able to cause disease in people or animals

Compounds

virulent strain
  • Specialized
2 6.5

A very strong germ that spreads easily and makes people very sick

virulent backlash
  • Literature
8.1

A very strong angry reaction by many people against someone or something

How Harmful

lethal
193 4.8
virulent
  • Specialized
14 9.1
harmful
161 2.6
mild
107 1.0
harmless
231 1.0

Surface Forms

virulent positive

Morphology

virulent = virus (semi-transparent) = virul + ent

The adjective is historically related to 'virus' so the sense 'highly infectious/harmful' is somewhat guessable, but the specific suffixation and form are not fully transparent to average learners.

Etymology

Virulent comes from the Latin word virus, which meant 'poison'. Think of the modern word virus, which can be dangerous and spread fast; so virulent describes something very harmful or quick to cause disease.