pernicieux
Meanings
Adjective
1. insidious (having a slow and discreet, but dangerous evolution) (medicine, rare)
2. morally harmful; pernicious (literary)
3. literally harmful or dangerous, usually of animals or persons (dated)
Examples4
fièvre pernicieuse
pernicious fever (old term for neuro-malaria, the most serious form of malaria fever)
Va, je t’abandonne aux gens qui te donnent de si pernicieux conseils.
Go, I shall let you to those who give you such pernicious advice.
anémie pernicieuse
pernicious anemia, or Biermer's anemia, a form of megaloblastic anemia due to vitamin B12 deficiency
Une demi-vérité est plus pernicieuse qu'un mensonge.
A half-truth is more pernicious than a lie.