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pernicious

pernicious

23 8.2
Harmful in a slow and hidden way
  • adjective
  • /pərˈnɪʃəs/
  • Formal
translation icon : pernicioso
  • The pernicious effects of pollution can slowly damage our health over time.
  • pernicious effects
  • pernicious influence
  • pernicious myth

And that's one of the most pernicious forms of evil of our time.

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Examples

  • The story in the paper affected her in a deep and pernicious way.

    Fiction book (1990)
  • Colombia's drug economy, with its pernicious effects, is as pervasive as ever.

    Academic text (1999)
  • His influence on the children is pernicious, or so they say.

    Fiction book (2001)
  • Now, each one of you has contributed in some way to the pernicious spread of golf.

  • And one of the real pernicious challenges of lead is that it is invisible to the naked eye.

  • And that's one of the most pernicious forms of evil of our time.

  • This is particularly pernicious for African producers of food who find that they face a big tariff barrier when trying to export to Europe.

  • Lead is one of the most pervasive and pernicious toxic substances being released into the environment.

    Academic text (1990)
  • Perhaps one of the most pernicious myths revolves around the purpose of RTI.

    Academic text (2013)
  • Social media can have a pernicious influence on young people's self-esteem and wellbeing.

Synonyms

harmful
vspernicious
161 2.6

Causing damage to people, animals or things

is more intense and often works gradually or subtly
detrimental
vspernicious
49 6.3

Causing harm to people, things, or the environment

is stronger in effect and often gradual rather than simply harmful
insidious
vspernicious
  • Formal
49 8.4

Spreading slowly and quietly while causing harm

is harmful but usually not described as secretly spreading
deleterious
vspernicious
  • Formal
9 8.5

Harmful to people, animals, or plants

is not limited to living things and stresses gradual strong harm
malign
vspernicious
  • Formal
4 7.6

A harmful, evil force that causes people or things to suffer

is harmful in effect but not necessarily evil in intent or nature
unwholesome
vspernicious
4 6.3

Harmful to health or to how someone behaves

is harmful generally and focuses on gradual often subtle damage rather than moral aspect
pestilent
vspernicious
  • Formal
1 8.8

Very harmful and causing great trouble or damage

is very harmful but focuses on gradual subtle harm rather than sudden deadly damage
baneful
vspernicious
  • Formal
1 9.1

Causing great harm or serious damage

is very harmful in a gradual or subtle way rather than obviously destructive

Antonyms

231 1.0

Not able to hurt people or things

138 3.4

Making something better or producing a good result

Compounds

pernicious anemia
  • Specialized
1 5.7

A long-lasting blood problem where the body cannot make enough red blood cells because it cannot take in vitamin B12

How Harmful

lethal
1 4.3
destructive
243 4.2
pernicious
  • Formal
23 8.2
deleterious
  • Formal
9 8.5
injurious
8 7.0
harmful
161 2.6
damaging
40 4.6

Surface Forms

pernicious positive

Morphology

pernicious = pernici + ous

The suffix '-ous' is productive, but the root 'pernici' is not a recognizable English base and learners cannot derive the meaning from the parts.

Etymology

Pernicious comes from the Latin pernicies, meaning 'destruction', built from per- 'completely' and necare 'to kill'. So something pernicious causes great harm, often slowly or in a hidden way.