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’
    • ‘He's correct that the right of jury nullification trumps any worries about the possible pernicious effects of the drug.’
    • ‘Instrumental rationality has had a particularly pernicious effect on the environment.’
    • ‘Yet some faculty perceive the pernicious effects of these forms and want to end them.’
    • ‘Physiological laws can explain the harmful and pernicious effects of deep breathing.’
    • ‘What worries me are the pernicious influences on athletes like him.’
    • ‘Yet this fear of the pernicious effects of property rights did not last for long.’
    • ‘It also stands for the complete victory of the Buddhist Doctrine over all harmful and pernicious forces.’
    • ‘At the same time, the pernicious influence of new urban cultural patterns could share some of the blame for rural degeneration.’
    • ‘This new form of protectionism has an added pernicious quality.’
    • ‘Just putting some healthier options on the menu doesn't counteract the more pernicious effect a large global corporation has.’
    • ‘Trying to keep out the pernicious effects of popular culture is a losing battle.’
    • ‘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.’
    • ‘Equally problematic is the pernicious effect of bad design on the environment.’
    • ‘At its most extreme whole economies are destroyed by its pernicious influence.’
    • ‘Outside of the identity principle, however, the correlation is both pernicious and ethically dubious.’
    • ‘I pretend to teach young people about the pernicious effects of a total surveillance state.’
    • ‘The trouble is that fear is almost as pernicious as perceived danger.’
    • ‘Over the past few months and years, some pernicious myths have started to become a little too popular.’
    • ‘In fact, it can actually be pernicious because it covers up a reality.’
    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

/pərˈnɪʃəs//pərˈniSHəs/