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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"

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    More definitions, origin and scrabble points

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

    Pernicious means having a very harmful effect or influence. Learn how to use this formal adjective with sentences from the Cambridge English Corpus and translations in different languages.

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

    Pernicious means highly injurious or destructive, or wicked. Learn its synonyms, examples, etymology, and related words from the Merriam-Webster dictionary.

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

    Pernicious means causing insidious harm or ruin; ruinous; injurious; hurtful. Learn the origin, synonyms, and usage of this adjective with example sentences from various sources.

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

    Pernicious means very harmful or causing great injury, ruin, or death. It can also mean wicked or evil, but this sense is rare. See synonyms, pronunciation, and usage examples of pernicious.

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

    Pernicious means having a very harmful effect or influence. Learn how to use this formal adjective in different contexts and languages with Cambridge Dictionary.

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

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

  8. www.oxfordlearnersdictionaries.com › english › perniciouspernicious adjective - Definition, pictures, pronunciation and...

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