American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Working or spreading harmfully in a subtle or stealthy manner: insidious rumors; an insidious disease.
- adj. Intended to entrap; treacherous: insidious misinformation.
- adj. Beguiling but harmful; alluring: insidious pleasures.
Century Dictionary and Cyclopedia
- Lying in wait; hence, deceitful; sly; treacherous.
- Designed or adapted to entrap; deceptive; insnaring: as, insidious arts.
- adj. Producing harm in a stealthy, often gradual, manner.
- adj. Intending to entrap; alluring but harmful.
- adj. nonstandard Treacherous.
GNU Webster's 1913
- adj. Lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; -- said of persons.
- adj. Intended to entrap; characterized by treachery and deceit.
- adj. Acting or proceeding unobserved or in a seemingly harmless manner, but slowly or eventually doing great damage.
- adj. beguiling but harmful
- adj. intended to entrap
- adj. working or spreading in a hidden and usually injurious way
- From Latin īnsidiōsus ("cunning, artful, deceitful"), from īnsidiae ("a lying in wait, an ambush, artifice, stratagem") + -ōsus, from īnsideō ("to sit in or on"), from in ("in, on") + sedeō ("to sit"). (Wiktionary)
- From Latin īnsidiōsus, from īnsidiae, ambush, from īnsidēre, to sit upon, lie in wait for : in-, in, on; see in-2 + sedēre, to sit; see sed- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“I mean, you've got Darth Sidious (as in "insidious," I assume) and then the even-more-obviously named Darths Maul and Tyrannus.”
“The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well-meaning but without understanding.”
“But I fear the most insidious is because people think that changing their lightbulbs and sorting their recyclables counts as “doing your bit”.”
“In my opinion, one of the more insidious is the hijacked account scam.”
“Far more insidious is Lieberman, with his coprophagic grin and his profession of good will.”
“What makes Huffington Post more insidious is the way they can buy of dissent readily by giving an organization their own blog.”
“The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well meaning but without understanding.”
“The latest strategy is now seen dropping unsupported accusations across the media spectrum to the effect that the intelligence agency's assignment of Ambassador Joseph Wilson to look into the now-discredited Iraq/Niger/uranium claims were all part of a long-term insidious scheme to try and discredit the Bush Administration.”
“Less obvious, but more insidious, is the prejudice against skin color: dark, not light, is the dominant complexion.”
“insidious movie violence" Los Angeles - One of the most violent movie stars of all time has come out against what he calls insidious movie violence.”
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