Definition of pernicious in English:

pernicious

adjective

  • Having a harmful effect, especially in a gradual or subtle way.

    ‘the pernicious influences of the mass media’
    • ‘Trying to keep out the pernicious effects of popular culture is a losing battle.’
    • ‘Yet some faculty perceive the pernicious effects of these forms and want to end them.’
    • ‘He's correct that the right of jury nullification trumps any worries about the possible pernicious effects of the drug.’
    • ‘The register will make an important contribution to tackling this pernicious evil.’
    • ‘Instead, they say, it is a pernicious and widespread cancer infecting the media and political classes across Europe.’
    • ‘What worries me are the pernicious influences on athletes like him.’
    • ‘It also stands for the complete victory of the Buddhist Doctrine over all harmful and pernicious forces.’
    • ‘Physiological laws can explain the harmful and pernicious effects of deep breathing.’
    • ‘Equally problematic is the pernicious effect of bad design on the environment.’
    • ‘This new form of protectionism has an added pernicious quality.’
    • ‘Yet this fear of the pernicious effects of property rights did not last for long.’
    • ‘The trouble is that fear is almost as pernicious as perceived danger.’
    • ‘At its most extreme whole economies are destroyed by its pernicious influence.’
    • ‘I pretend to teach young people about the pernicious effects of a total surveillance state.’
    • ‘In fact, it can actually be pernicious because it covers up a reality.’
    • ‘Outside of the identity principle, however, the correlation is both pernicious and ethically dubious.’
    • ‘At the same time, the pernicious influence of new urban cultural patterns could share some of the blame for rural degeneration.’
    • ‘Just putting some healthier options on the menu doesn't counteract the more pernicious effect a large global corporation has.’
    • ‘Over the past few months and years, some pernicious myths have started to become a little too popular.’
    • ‘Instrumental rationality has had a particularly pernicious effect on the environment.’
    harmful, damaging, destructive, injurious, hurtful, detrimental, deleterious, dangerous, adverse, inimical, unhealthy, unfavourable, bad, evil, baleful, wicked, malign, malevolent, malignant, noxious, poisonous, cancerous, corrupting, ruinous, deadly, lethal, fatal
    View synonyms

Origin

Late Middle English: from Latin perniciosus ‘destructive’, from pernicies ‘ruin’, based on nex, nec- ‘death’.

Pronunciation

pernicious

/pərˈniSHəs//pərˈnɪʃəs/