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.’
    • ‘Equally problematic is the pernicious effect of bad design on the environment.’
    • ‘Outside of the identity principle, however, the correlation is both pernicious and ethically dubious.’
    • ‘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.’
    • ‘Instead, they say, it is a pernicious and widespread cancer infecting the media and political classes across Europe.’
    • ‘Instrumental rationality has had a particularly pernicious effect on the environment.’
    • ‘Over the past few months and years, some pernicious myths have started to become a little too popular.’
    • ‘This new form of protectionism has an added pernicious quality.’
    • ‘Physiological laws can explain the harmful and pernicious effects of deep breathing.’
    • ‘In fact, it can actually be pernicious because it covers up a reality.’
    • ‘At the same time, the pernicious influence of new urban cultural patterns could share some of the blame for rural degeneration.’
    • ‘What worries me are the pernicious influences on athletes like him.’
    • ‘At its most extreme whole economies are destroyed by its pernicious influence.’
    • ‘Yet some faculty perceive the pernicious effects of these forms and want to end them.’
    • ‘Trying to keep out the pernicious effects of popular culture is a losing battle.’
    • ‘The trouble is that fear is almost as pernicious as perceived danger.’
    • ‘The register will make an important contribution to tackling this pernicious evil.’
    • ‘Just putting some healthier options on the menu doesn't counteract the more pernicious effect a large global corporation has.’
    • ‘I pretend to teach young people about the pernicious effects of a total surveillance state.’
    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

/pəˈnɪʃəs/