pernicious

• Qualifie quelque chose qui exerce un effet nocif ou destructeur, généralement de manière progressive ou insidieuse, sans être toujours immédiatement visible.

Describes something that has a harmful effect, especially in a gradual or subtle way.

1. Harmful in a gradual or subtle wayC1formal

   Having a harmful effect, especially in a way that is not easily noticed or is gradual.

   pernicieux

   • The pernicious influence of propaganda can erode democratic values.
   • Pernicious gossip can destroy reputations over time.
   • The pernicious effects of pollution on health are well documented.

   Synonymescorrosiveinsidioussubtle

   Antonymesbenignharmlesssalutary

2. Deadly or destructiveC2formal

   Causing great harm or death; fatal.

   Perfide, funeste, mortel

   • The pernicious disease spread rapidly through the population.
   • Pernicious anemia is a serious condition that affects red blood cells.
   • The pernicious weed choked out all other plants in the garden.

   Synonymesbanefuldeadlydestructivefatalharmfullethalnoxiousruinous

   Antonymesbeneficialsalutarywholesome