Pernicious

Adjective

Definition: Having a harmful effect, especially in a gradual or subtle way.

Synonyms: Harmful, Damaging, Destructive, Detrimental, Injurious

Antonyms: Beneficial, Advantageous, Helpful, Favorable, Wholesome

Examples:

The pernicious effects of smoking on one's health are well-documented.
Social media can have a pernicious impact on mental well-being.

Mnemonics:

Think of "pernicious" as "poisonous" or "corrosive" in terms of its harmful nature.

Etymology:

Origin:

The word "pernicious" originated in the late 16th century from the Latin word "perniciosus," which means "destructive."

Historical Usage:

Over time, the usage of "pernicious" has remained relatively consistent and has been used to describe something that is harmful or causing gradual damage.

Related Idioms:

Idiom:

"Pernicious influence"

Explanation:

Refers to a harmful or negative impact or effect exerted by someone or something.

Misconceptions:

Misconception:

Thinking that "pernicious" is just a synonym for "harmful" without emphasizing its subtle and gradual nature.

Explanation:

While "pernicious" does mean harmful, it specifically emphasizes the insidious and long-term effects of something, rather than immediate or obvious harm.