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Adjective pestilential has 1 sense
  1. pestilent, pestilential, pestiferous, plaguey - likely to spread and cause an epidemic disease; "a pestilential malignancy in the air"- Jonathan Swift; "plaguey fevers"
    Antonyms: endemic, endemical (indirect, via epidemic, ecdemic)
    Antonym: ecdemic (indirect, via endemic, epidemic)
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