[ɪnsˈɪdɪəs], [ɪnsˈɪdɪəs], [ɪ_n_s_ˈɪ_d_ɪ__ə_s]

Definitions of insidious:

  1.   Intended to entrap; characterized by treachery and deceit; as, insidious arts.
  2.   Lying in wait; watching an opportunity to ensnare; treacherous; deceitful; intended to ensnare; working secretly.
  3.   beguiling but harmful; " insidious pleasures"
  4.   working or spreading in a hidden and usually injurious way; " glaucoma is an insidious disease"; " a subtle poison"
  5.   Treacherous, stealthy; noting a disease which progresses with few or no symptoms to indicate its gravity.
  6.   Latent; not apparent.
  7.   Doing or contriving secret harm; treacherous.
  8.   Lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; - said of persons; as, the insidious foe.
  9.   Insidiously.
  10.   Watching an opportunity to insnare: intended to entrap: treacherous.
  11.   Deceitful; sly; treacherous; intended to ensnare or entrap.
  12.   Treacherous; ensnaring.
  13.   Treacherous; deceitful; operating secretly.

Antonyms for insidious:

harmless, white, safe, Hurtless, inoffensive, anodyne, unseductive, benign, innocent, innocuous.

Quotes for insidious:

  1. Experience has taught me to believe that, these human beans are the most insidious enemies man, with a tendency to corpulence in advanced life, can possess, though eminently friendly to youth. – William Banting
  2. What's happened is that an incessant, an insidious insurgency has repeatedly attacked the key infrastructure targets, reducing outputs. – Stuart Bowen
  3. The greatest dangers to liberty lurk in the insidious encroachment by men of zeal, well meaning but without understanding. – Louis D. Brandeis
  4. In recompense, envy may be the subtlest- perhaps I should say the most insidious of the seven deadly sins. – Joseph Epstein
  5. Partial truths or half -truths are often more insidious than total falsehoods. – Samuel P. Huntington
  6. Folks, the most insidious part of this whole health care scheme is that all of these vast medical expenditures will become nothing more than government budget items. We individuals will no longer exist. The relationship between a government and citizen will change forever. – Rush Limbaugh
  7. I am concerned for the security of our great Nation; not so much because of any threat from without, but because of the insidious forces working from within. – Douglas MacArthur
  8. I'm concerned about the insidious influence of the media's bad messages that undermine the lessons parents try to instill in their sons and daughters. – John Ratzenberger
  9. And the insidious thing is that people will either see a movie because it did well last weekend or won't see it because it didn't do well. – Meg Ryan
  10. Unfortunately, money in politics is an insidious thing- and a loophole in our campaign finance system was taken advantage of with money going to existing or new 527 groups with the sole purpose of influencing the election. – Olympia Snowe
  11. That's the thing about depression: A human being can survive almost anything, as long as she sees the end in sight. But depression is so insidious and it compounds daily, that it's impossible to ever see the end. The fog is like a cage without a key. – Elizabeth Wurtzel

Usage examples for insidious:

  1. He was evidently afraid of her- afraid of himself, too- because of the evil impulses her insidious influence had aroused in him. ” – Banked Fires by E. W. (Ethel Winifred) Savi
  2. “ Mary, who did not consider the extent of this insidious question, answered with fervor, " Never! ” – Thaddeus of Warsaw by Jane Porter
  3. She had been coming to The Colonial only eleven years, so really, she should have been on the other side of the veranda, but Mrs. Stott had such an insidious way of getting where and what she wanted that she was " one of them" almost before they knew it. ” – The Dude Wrangler by Caroline Lockhart
  4. As already stated, the disease is insidious and progressive, and it is hopeless to expect to arrest the growths once they are started. ” – Diseases of the Horse's Foot by Harry Caulton Reeks
  5. And was not the same ear lent, at most critical moment, to the insidious Alexander Farnese, with his whispers of peace, which were potent enough to drown all the preparations for the invincible Armada? ” – History of the United Netherlands, 1586-89, Vol. II. Complete by John Lothrop Motley Last Updated: February 7, 2009
  6. In vain did Lady Mary cross- examine her daughter in the most insidious manner. ” – Belles and Ringers by Hawley Smart
  7. “ Maurice; with his " solemn, sly wit," also gave the Earl much trouble, saying little; but thinking much, and listening to the insidious Paul. ” – History of the United Netherlands, 1586-89, Vol. II. Complete by John Lothrop Motley Last Updated: February 7, 2009
  8. Joys were insidious dangerous things that might lead to the leaving undone of obvious duties. ” – Jan and Her Job by L. Allen Harker
  9. The affection is of insidious development, and is usually ascribed to sinking of the transverse arch of the foot- pes transverso- planus- the result of weakness or of wearing badly fitting boots. ” – Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. by Alexander Miles Alexis Thomson
  10. His insidious praises of my genius made no impression. ” – Phemie Frost's Experiences by Ann S. Stephens
  11. There is an insidious yet irresistible, process of social degradation. ” – The Rising Tide of Color Against White World-Supremacy by Theodore Lothrop Stoddard
  12. And Crawshay was capable of it- of perceiving the insidious revenge- of taking it without compunction or remorse. ” – A Thief in the Night by E. W. Hornung
  13. “ I closed my eyes and tried to review all the insidious things that had happened in the last twenty- four hours. ” – Life Blood by Thomas Hoover
  14. The howling storm, the holy truce of night, High tossing ice- isles crashing round thy side, Insidious rocks that pierce the tumbling tide? ” – The Columbiad by Joel Barlow
  15. The state of affairs which has come about was uncertain in origin, insidious in growth, and has developed over a wide field. ” – Report of the Special Committee on Moral Delinquency in Children and Adolescents The Mazengarb Report (1954) by Oswald Chettle Mazengarb et al.
  16. Well, that's the truth- and now you see that those statements made about me are the most insidious form of lying- with a good foundation of half- truths. ” – Afterwards by Kathlyn Rhodes
  17. Palpitation became more frequent and more violent, and then just as suddenly all this would stop again, as it happens sometimes with these insidious diseases which at intervals seem to entirely forget their victims. ” – Renée Mauperin by Edmond de Goncourt and Jules de Goncourt
  18. “ No influence so insidious as this, and none so fatal, has ever assailed the Christian church. ” – The Church and Modern Life by Washington Gladden
  19. The illness, whatever it was- and neither Mr. Sheldon nor the portly and venerable physician whom he called in could find a name for it- crept upon the patient with stealthy and insidious steps. ” – Charlotte's Inheritance by M. E. Braddon

Rhymes for insidious: