Pernicious

adjective
/pəˈnɪʃəs/
Having a harmful effect, especially in a gradual, subtle, or scarcely perceptible way; deeply destructive or injurious. Often used of influences, ideas, or tendencies whose damage accumulates unnoticed.

✍️ Usage in a UPSC answer

The pernicious influence of unchecked money power in electoral politics corrodes the integrity of representative democracy far more insidiously than any overt act of fraud, for it warps policy outcomes long before a single vote is cast.

Synonyms

harmfulinjuriousdestructivedeleteriousbanefulnoxious

Antonyms

beneficialbenignsalutaryharmless

🌱 Word Family

perniciously (adv), perniciousness (n), pernicity (n, archaic)

🔡 Root

Latin per- = completely; nex (gen. necis) = violent death → pernicies = ruin; perniciosus = destructive

📜 Etymology

Early 15th c., from Old French pernicios and directly from Latin perniciosus 'destructive', from pernicies 'ruin, destruction, death', from per- 'completely' + nex (genitive necis) 'violent death, murder'.

🧠 Memory Hook

Root link: Latin per- ('thoroughly') + nex/necis ('violent death') — think of it as "PER-NICE-ious is the opposite of nice": something thoroughly deadly that quietly works toward ruin.

🎯 How This Word Works in UPSC Writing

Having a harmful effect, especially one that is gradual and not immediately apparent. It suits GS1 and GS4 discussion of slow social harms such as the pernicious effects of stereotyping, where damage accumulates without any single identifiable act. Because it implies subtlety as well as harm, it is stronger and more precise than simply calling something damaging.

⚖️ Don’t Confuse It With

Pernicious is harmful, often gradually and subtly. Insidious stresses the concealment of the harm as it develops. Detrimental is damaging without any implication of subtlety. Malignant implies actively spreading harm, and is stronger again.

🇮🇳 Hindi Meaning

हानिकारक (hānikārak) or विनाशकारी (vināshkārī) for the stronger sense.

Common Questions

What does pernicious mean?
Having a harmful effect, particularly one that develops gradually and is not immediately obvious.
How is pernicious different from detrimental?
Detrimental simply means damaging. Pernicious adds that the harm works gradually and often subtly.
Relevant across:GS1 · History, Geography & Society

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Resources
Ujiyari Ujiyari — Current Affairs