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1. Dictionary

   pernicious

   /pəˈnɪʃəs/

   adjective

   • 1. having a harmful effect, especially in a gradual or subtle way: "the pernicious influences of the mass media"

   Word Origin late Middle English: from Latin perniciosus ‘destructive’, from pernicies ‘ruin’, based on nex, nec- ‘death’.

   Derivatives

   • 1. perniciously adverb
   • 2. perniciousness noun

   Scrabble Points: 14

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   More definitions, origin and scrabble points

2. dictionary.cambridge.org › dictionary › englishPERNICIOUS | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   adjective. us / pərˈnɪʃ·əs / Add to word list. having a very harmful effect or influence: The book focuses on the pernicious effects of slavery. (Definition of pernicious from the Cambridge Academic Content Dictionary © Cambridge University Press) Examples of pernicious. pernicious.

3. www.merriam-webster.com › dictionary › perniciousPernicious Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › pernicious

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   The meaning of PERNICIOUS is highly injurious or destructive : deadly. How to use pernicious in a sentence. insidious, sinister, or pernicious? Synonym Discussion of Pernicious.

4. www.dictionary.com › browse › perniciousPERNICIOUS Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › pernicious

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   Pernicious definition: causing insidious harm or ruin; ruinous; injurious; hurtful. See examples of PERNICIOUS used in a sentence.

5. www.vocabulary.com › dictionary › perniciousPernicious - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › pernicious

   Pernicious means harmful and subtle, such as a poison gas that causes illness in those exposed to it over the course of years.

6. dictionary.cambridge.org › us › dictionaryPERNICIOUS | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

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   having a very harmful effect or influence: The cuts in government funding have had a pernicious effect on local health services. SMART Vocabulary: related words and phrases. Dangerous and harmful. adverse conditions. adverse effect. adverse publicity. adverse reaction. deleteriously. destabilizing. destructively. destructiveness. impact statement.

7. www.collinsdictionary.com › dictionary › englishPERNICIOUS definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   1. causing great injury, destruction, or ruin; fatal; deadly. 2. Rare.

8. www.oxfordlearnersdictionaries.com › us › definitionpernicious adjective - Definition, pictures, pronunciation and...

   www.oxfordlearnersdictionaries.com › us › definition

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   Definition of pernicious adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

9. www.thefreedictionary.com › perniciousPernicious - definition of pernicious by The Free Dictionary

   www.thefreedictionary.com › pernicious

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   1. Tending to cause death or serious injury; deadly: a pernicious virus. 2. Causing great harm; destructive: pernicious rumors. [Middle English, from Old French pernicios, from Latin perniciōsus, from perniciēs, destruction : per-, per- + nex, nec-, violent death; see nek- in Indo-European roots .] per·ni′cious·ly adv. per·ni′cious·ness n.

10. dictionary.cambridge.org › dictionary › learner-englishPERNICIOUS | meaning - Cambridge Learner's Dictionary

    dictionary.cambridge.org › dictionary › learner-english

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    PERNICIOUS definition: very harmful. Learn more.

11. www.oed.com › dictionary › pernicious_adj1pernicious, adj.¹ meanings, etymology and more - Oxford English ...

    www.oed.com › dictionary › pernicious_adj1

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    What does the adjective pernicious mean? There are three meanings listed in OED's entry for the adjective pernicious. See ‘Meaning & use’ for definitions, usage, and quotation evidence. See meaning & use. How common is the adjective pernicious? About 2 occurrences per million words in modern written English. See frequency.