(a.) Lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; -- said of persons; as, the insidious foe.
(a.) Intended to entrap; characterized by treachery and deceit; as, insidious arts.
Example Sentences:
(1) The controversy over the effects of low-level exposure to radiation enhances the perception of radiation as a particularly insidious phenomenon of nature.
(2) Meningiomas of the temporal bone are insidious and aggressive lesions.
(3) Onset is generally brutal, as in acute enteritis or an extradigestive infection (ENT...) but persists, or else, more often, the syndrome appears insidiously over several days.
(4) As the clinical presentation of "catheter infections" is often uncharacteristic and insidious, a definite diagnosis depends on bacteriological examination of the catheter.
(5) Seven of these patients had presented with insidious symptoms, seven had serum markers of hepatitis B infection, and the four who were HBsAg positive had relatively lower serum HBsAg concentrations than did those patients who continued with chronic persistent hepatitis.
(6) On the other hand, both blunt trauma and posterior stab wounds frequently caused isolated retroperitoneal duodenal lesions where the diagnosis was not evident on admission, but in which the insidious and progressive development of symptoms and signs drew attention to the need for laparotomy.
(7) The clinical presentations were similar to other forms of peritonitis complicating PD except for a more insidious onset.
(8) A 56-year-old woman developed insidiously progressive, painless weakness of her left hand.
(9) Patients with multiple choledochal stones usually presented with insidious onset of painless jaundice, simulating malignant bile duct obstruction, in contrast to the abrupt onset of cholangitis or pain experienced by patients with one to three stones.
(10) A 51-year-old female patient, admitted with a chief complaint of dizziness, had bulging of the occipital area, which had started insidiously.
(11) A women with longstanding seropositive rheumatoid arthritis presented with the insidious onset of a hyperviscosity syndrome.
(12) Respiratory distress may be insidious in onset and must be anticipated.
(13) In childhood, scoliosis is usually insidious and is rarely symptomatic.
(14) Epstein-Barr virus (EBV) infection, although it is sometimes unrecognized and insidious, is one of the etiologies to be considered.
(15) This is incompetent journalism in its most insidious form."
(16) The Spurs were missing simple shots but insidiously squirmed their way back into the game, with James returning to Earth and Leonard in fine shooting form.
(17) Peritoneal pseudomyxoma has several main features: it is insidious, recurrent, obstinate and severe.
(18) Onset of pain was insidious and the symptoms were thought to be related to synovitis due to SLE.
(19) Tracheostomy may be a life saving procedure in these circumstances, but delay may prove fatal when its need arises insidiously.
(20) The early and precise diagnosis of linitis plastica-type tumours of the rectum and anal canal is difficult because of their insidious presentation and anaplastic nature.
Perfidious
Definition:
(a.) Guilty of perfidy; violating good faith or vows; false to trust or confidence reposed; teacherous; faithless; as, a perfidious friend.
(a.) Involving, or characterized by, perfidy.
Example Sentences:
(1) It's almost starting to feel like we're back in the good old days of July 2005, when Paris lost out to London in the battle to stage the 2012 Olympic Games, a defeat immediately interpreted by France as a bitter blow to Gallic ideals of fair play and non-commercialism and yet another undeserved triumph for the underhand, free-market manoeuvrings of perfidious Albion.
(2) The classic European blood libel, like many other classic European creations, had a strict set of images which must always contain a cherubic Gentile child sacrificed by those perfidious Jews, his blood to be used for ritual purposes.
(3) A defence ministry statement said the rebels "cynically and perfidiously" shot down the plane using anti-aircraft guns and heavy calibre machine guns.
(4) After stating earlier this week that "politics have to reassert primacy over the financial markets", she said that the "speculators are our opponents" and described the banks as "perfidious".
(5) Donald Trump's homicidal healthcare bill will kill some, and enrich others | Adam Gaffney Read more Pelosi is not alone in her perfidy.
(6) Perfidious as Albion may be, the other 27 member states did not want to trigger its departure from the union.
(7) In part, this results from the reasonable thinking that the financial crisis, or at least the manner of perfidy that led to it, never ended.
(8) What is interesting, however, is that in Italy, the work is done to expose these perfidies: if you go into any Feltrinelli bookshop, you will see shelves of books that detail them, by brave reporters working with equally bold examining magistrates like those in Palermo, past and present.
(9) That’s all the perfidy of terrorism, to resort to blackmail, death and threats,” the prime minister, Manuel Valls, told Europe 1 radio.
(10) He is drawn back again and again to the perfidy of pretty much everybody in the music industry who doesn’t make music themselves.
(11) Realism in foreign policy has a long and distinguished tradition, not least in Britain – otherwise the French would never complain about 'perfidious Albion'.
(12) The perfidious Poms will keep the two George Stubbs paintings in Greenwich, London, where they will hang in the National Maritime Museum .
(13) So the Journal became a repository of all the woes and disappointed hopes suffered in their "hard and horrible struggle against anonymity": critical indignities, lack of sales, the perfidy of reviewers, the unmerited success of friends (some of whom, like Zola, were celebrated for techniques the Goncourts claimed to have pioneered).
(14) She has more in common with Blair, too, than she thinks – in her Chilcot appearance it was striking how blame and perfidy and mistakes lie anywhere but at her door.
(15) This is, of course, the traditional role of the perfidious Anglo-American world in the French imagination.
(16) For Hollywood, which he called "Shepherd's Bush wrapped in cellophane", and the domestic industry he adapted the act in more than 100 films to roles such as the Roundhead colonel in the British civil-war epic The Scarlet Blade (1963), the perfidious Inspector Fred "Nosey" Parker in The Wrong Arm of the Law (1962), and as Stanley Farquhar, the spy who was as inefficient as the dog in The Spy With a Cold Nose (1966).
(17) The perfidies of Albion may be many in the eyes of Scottish nationalists but they do not begin to compare to what Catalans feel about Madrid.
(18) But the significance of these savage executions – bodies tortured and torched or dumped in a river – lies in the entwining of ideological and narco violence: two nightmares, two perfidious calculations, in one.
(19) The EU budget, to those who moved and supported the rebel amendment, is a symbol of the perfidy of the EU itself.
(20) In a recent interview the BBC's Stephen Sackur harangued him about Pakistani perfidy.