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insidious

insidious

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views updated Jun 27 2018

in·sid·i·ous / inˈsidēəs/ • adj. proceeding in a gradual, subtle way, but with harmful effects: sexually transmitted diseases can be insidious and sometimes without symptoms. ∎ treacherous; crafty: tangible proof of an insidious alliance.DERIVATIVES: in·sid·i·ous·ly adv.in·sid·i·ous·ness n.

The Oxford Pocket Dictionary of Current English

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insidious

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views updated Jun 11 2018

insidious XVI. — L. insidiōsus, f. insidiæ ambush, trick, rel. to insidēre sit in or upon, be settled, f. IN-1 + sedēre SIT; see -IOUS.

The Concise Oxford Dictionary of English Etymology T. F. HOAD

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insidious

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views updated May 29 2018

insidious (in-sid-iŭs) adj. describing a disease that develops gradually and imperceptibly.

A Dictionary of Nursing

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