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Word of the Day Tuesday, June 9, 2026

pernicious

/pərˈnɪʃəs/ adjective · British & US
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What does pernicious mean?

adjective

Harmfully influential or corrupting; causing harm or damage, especially gradually or over time. Often used to describe something that has a negative effect on someone's health or well-being.

Example

"The pernicious effects of smoking on one's lungs can be devastating if left unchecked."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for pernicious

Antonyms of pernicious

Rhymes with pernicious

Etymologically related