(comparative more perniciously, superlative most perniciously)
- In a pernicious manner.
pernicious + -ly
Variant of pernicious
- causing great injury, destruction, or ruin; fatal; deadly
- Rare wicked; evil
Origin of perniciousFrench pernicieux ; from Classical Latin perniciosus ; from pernicies, destruction ; from pernecare, to kill ; from per, thoroughly + necare, to kill: see necro-