The word “pernicious” is an adjective that means causing great harm, destruction, or injury, often in a gradual or subtle way. It is commonly used to describe something that is extremely harmful or destructive, especially in a hidden or deceptive manner.
Interesting fact: The word “pernicious” originated from the Latin word “perniciosus,” which means “destructive” or “deadly.” It is derived from the Latin word “pernicies,” which means “ruin” or “destruction.”