Synonyms of pernicious in English:

pernicious


See US English definition of pernicious

See UK English definition of pernicious

See Spanish definition of pernicioso

adjective

1‘a pernicious influence on society’

SYNONYMS
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
literary malefic, maleficent
archaic pestilent, pestilential, baneful, pestiferous
ANTONYMS

beneficial, benign, favourable