Definition of insidious in English:

insidious

adjective ɪnˈsɪdɪəsɪnˈsɪdiəs

Proceeding in a gradual, subtle way, but with very harmful effects.
sexual harassment is a serious and insidious problem
Example sentencesExamples
- Silently and stealthily this insidious, progressive disease has taken over.
- This trade recession will be just as insidious in its effects as any market blowout.
- The propaganda is so insidious in the Murdoch press you can't even distinguish between news and opinion.
- There was the slow, insidious change from fresh-faced beauty to freak.
- Our sport is rife with that same insidious elitism that has decayed the core of other field sports, which now face the very real prospect of being outlawed.
- Dyens eventually left France, feeling overwhelmed by what he saw as insidious, unspoken racism.
- An offshoot of ventriloquist journalism, these are one of the more insidious forms of misinformation.
- Their approach tends to be more subtle - and perhaps even more insidious.
- Significantly, even continuous low-level noise can be an insidious stressor.
- The onset is more insidious in brain tumors and the progress to vomiting is gradual.
- It need by no means be obvious: it can be insidious and subtle.
- Slow calibration drift is a subtle and insidious source of unreliable instrument readings.
- Yet the incursions on free speech can be insidious and imperceptible.
- The obstruction and harassment is subtle but insidious and seriously affects the ability of the aid agencies to do their job.
- The most insidious marketing comes from the baby food companies.
- Increases in childhood obesity and insidious health problems are, we suspect, linked to an increased consumption of junk food.
- But what makes this disease insidious is that in most cases it goes undetected until it's too late.
- The more insidious problem that will remain is stacking the ballot paper in a deliberate attempt to increase the informal vote.
- Nuclear disc lesions are of gradual or insidious onset, the history may be on and off back pain for weeks and back pain getting worse.
- The current ubiquity of advertising is certainly one of its most subtle and insidious properties.
Synonyms
stealthy, subtle, surreptitious, sneaking, cunning, crafty, Machiavellian, artful, guileful, sly, wily, tricky, slick, deceitful, deceptive, dishonest, underhand, backhanded, indirect
informal sneaky

Derivatives

insidiousness

noun ɪnˈsɪdɪəsnəsɪnˈsɪdiəsnəs

I don't underestimate the insidiousness of both visible and hidden surveillance technologies.
Example sentencesExamples
- But for five Irish teenagers, the magnifying glass doesn't reveal the insidiousness of California - it only inflates its lure and significance.
- Asthma has become a common ailment in modern society, as the deteriorating environment and stress work their insidiousness against the human body.
- Slowly, with an insidiousness no one recognized, those businesses began to disappear until now many of the buildings sit empty and abandoned.
- Indulged and defended by successive Mail editors he continued to highlight the insidiousness of the apartheid regime and its increasing desperation.

Origin

Mid 16th century: from Latin insidiosus 'cunning', from insidiae 'an ambush or trick', from insidere 'lie in wait for', from in- 'on' + sedere 'sit'.

Rhymes

fastidious, hideous, invidious, perfidious

Definition of insidious in US English:

insidious

adjectiveɪnˈsɪdiəsinˈsidēəs

1Proceeding in a gradual, subtle way, but with harmful effects.
sexually transmitted diseases can be insidious and sometimes without symptoms
Example sentencesExamples
- Increases in childhood obesity and insidious health problems are, we suspect, linked to an increased consumption of junk food.
- An offshoot of ventriloquist journalism, these are one of the more insidious forms of misinformation.
- There was the slow, insidious change from fresh-faced beauty to freak.
- Their approach tends to be more subtle - and perhaps even more insidious.
- Dyens eventually left France, feeling overwhelmed by what he saw as insidious, unspoken racism.
- The obstruction and harassment is subtle but insidious and seriously affects the ability of the aid agencies to do their job.
- This trade recession will be just as insidious in its effects as any market blowout.
- Silently and stealthily this insidious, progressive disease has taken over.
- It need by no means be obvious: it can be insidious and subtle.
- The onset is more insidious in brain tumors and the progress to vomiting is gradual.
- The most insidious marketing comes from the baby food companies.
- The propaganda is so insidious in the Murdoch press you can't even distinguish between news and opinion.
- Yet the incursions on free speech can be insidious and imperceptible.
- Slow calibration drift is a subtle and insidious source of unreliable instrument readings.
- Our sport is rife with that same insidious elitism that has decayed the core of other field sports, which now face the very real prospect of being outlawed.
- Significantly, even continuous low-level noise can be an insidious stressor.
- But what makes this disease insidious is that in most cases it goes undetected until it's too late.
- Nuclear disc lesions are of gradual or insidious onset, the history may be on and off back pain for weeks and back pain getting worse.
- The current ubiquity of advertising is certainly one of its most subtle and insidious properties.
- The more insidious problem that will remain is stacking the ballot paper in a deliberate attempt to increase the informal vote.
Synonyms
stealthy, subtle, surreptitious, sneaking, cunning, crafty, machiavellian, artful, guileful, sly, wily, tricky, slick, deceitful, deceptive, dishonest, underhand, backhanded, indirect
1. 1.1 Treacherous; crafty.
  tangible proof of an insidious alliance
  Example sentencesExamples
  His fast-talking portrayal of an insidious, damaged sexual predator is undoubtedly brilliant.
  The humanitarian argument is a particularly insidious one.
  I'd far rather go down in a face-to-face challenge, not after some insidious little campaign of back-biting.
  They are, in my view, the most insidious of traitors.
  And yet, the same argument reinvents itself time and again in all sorts of insidious avatars.
  Even the insidious cane toad can't try and sneak through quarantine.
  I learned that you have charged that your company is the victim of an insidious conspiracy masterminded by IBM.
  But there's nothing laughable about the creature itself, a thoroughly insidious and hateful little beast.
  Take up whatever insidious sport your smarmy boss has deemed ‘flavour of the month’.
  What they do is insidious, evil, and downright mean to their addict-victims like my wife.
  It harbours insidious designs in spite of its declared support for current Palestinian peace efforts.
  Personally, we can't stand this insidious practise of sneaking adverts into non-commercial formats.
  The more insidious the plot, the more difficult the cover up, and as the internet grows, so do the unanswered questions.
  Carol Kane plays the insidious Madame Morrible as the evil twin of Mrs. Slocum from Are You Being Served?

Origin

Mid 16th century: from Latin insidiosus ‘cunning’, from insidiae ‘an ambush or trick’, from insidere ‘lie in wait for’, from in- ‘on’ + sedere ‘sit’.

单词	insidious
释义	Definition of insidious in English: insidious adjective ɪnˈsɪdɪəsɪnˈsɪdiəs Proceeding in a gradual, subtle way, but with very harmful effects. sexual harassment is a serious and insidious problem Example sentencesExamples Silently and stealthily this insidious, progressive disease has taken over. This trade recession will be just as insidious in its effects as any market blowout. The propaganda is so insidious in the Murdoch press you can't even distinguish between news and opinion. There was the slow, insidious change from fresh-faced beauty to freak. Our sport is rife with that same insidious elitism that has decayed the core of other field sports, which now face the very real prospect of being outlawed. Dyens eventually left France, feeling overwhelmed by what he saw as insidious, unspoken racism. An offshoot of ventriloquist journalism, these are one of the more insidious forms of misinformation. Their approach tends to be more subtle - and perhaps even more insidious. Significantly, even continuous low-level noise can be an insidious stressor. The onset is more insidious in brain tumors and the progress to vomiting is gradual. It need by no means be obvious: it can be insidious and subtle. Slow calibration drift is a subtle and insidious source of unreliable instrument readings. Yet the incursions on free speech can be insidious and imperceptible. The obstruction and harassment is subtle but insidious and seriously affects the ability of the aid agencies to do their job. The most insidious marketing comes from the baby food companies. Increases in childhood obesity and insidious health problems are, we suspect, linked to an increased consumption of junk food. But what makes this disease insidious is that in most cases it goes undetected until it's too late. The more insidious problem that will remain is stacking the ballot paper in a deliberate attempt to increase the informal vote. Nuclear disc lesions are of gradual or insidious onset, the history may be on and off back pain for weeks and back pain getting worse. The current ubiquity of advertising is certainly one of its most subtle and insidious properties. Synonyms stealthy, subtle, surreptitious, sneaking, cunning, crafty, Machiavellian, artful, guileful, sly, wily, tricky, slick, deceitful, deceptive, dishonest, underhand, backhanded, indirect informal sneaky Derivatives insidiousness noun ɪnˈsɪdɪəsnəsɪnˈsɪdiəsnəs I don't underestimate the insidiousness of both visible and hidden surveillance technologies. Example sentencesExamples But for five Irish teenagers, the magnifying glass doesn't reveal the insidiousness of California - it only inflates its lure and significance. Asthma has become a common ailment in modern society, as the deteriorating environment and stress work their insidiousness against the human body. Slowly, with an insidiousness no one recognized, those businesses began to disappear until now many of the buildings sit empty and abandoned. Indulged and defended by successive Mail editors he continued to highlight the insidiousness of the apartheid regime and its increasing desperation. Origin Mid 16th century: from Latin insidiosus 'cunning', from insidiae 'an ambush or trick', from insidere 'lie in wait for', from in- 'on' + sedere 'sit'. Rhymes fastidious, hideous, invidious, perfidious Definition of insidious in US English: insidious adjectiveɪnˈsɪdiəsinˈsidēəs 1Proceeding in a gradual, subtle way, but with harmful effects. sexually transmitted diseases can be insidious and sometimes without symptoms Example sentencesExamples Increases in childhood obesity and insidious health problems are, we suspect, linked to an increased consumption of junk food. An offshoot of ventriloquist journalism, these are one of the more insidious forms of misinformation. There was the slow, insidious change from fresh-faced beauty to freak. Their approach tends to be more subtle - and perhaps even more insidious. Dyens eventually left France, feeling overwhelmed by what he saw as insidious, unspoken racism. The obstruction and harassment is subtle but insidious and seriously affects the ability of the aid agencies to do their job. This trade recession will be just as insidious in its effects as any market blowout. Silently and stealthily this insidious, progressive disease has taken over. It need by no means be obvious: it can be insidious and subtle. The onset is more insidious in brain tumors and the progress to vomiting is gradual. The most insidious marketing comes from the baby food companies. The propaganda is so insidious in the Murdoch press you can't even distinguish between news and opinion. Yet the incursions on free speech can be insidious and imperceptible. Slow calibration drift is a subtle and insidious source of unreliable instrument readings. Our sport is rife with that same insidious elitism that has decayed the core of other field sports, which now face the very real prospect of being outlawed. Significantly, even continuous low-level noise can be an insidious stressor. But what makes this disease insidious is that in most cases it goes undetected until it's too late. Nuclear disc lesions are of gradual or insidious onset, the history may be on and off back pain for weeks and back pain getting worse. The current ubiquity of advertising is certainly one of its most subtle and insidious properties. The more insidious problem that will remain is stacking the ballot paper in a deliberate attempt to increase the informal vote. Synonyms stealthy, subtle, surreptitious, sneaking, cunning, crafty, machiavellian, artful, guileful, sly, wily, tricky, slick, deceitful, deceptive, dishonest, underhand, backhanded, indirect 1.1 Treacherous; crafty. tangible proof of an insidious alliance Example sentencesExamples His fast-talking portrayal of an insidious, damaged sexual predator is undoubtedly brilliant. The humanitarian argument is a particularly insidious one. I'd far rather go down in a face-to-face challenge, not after some insidious little campaign of back-biting. They are, in my view, the most insidious of traitors. And yet, the same argument reinvents itself time and again in all sorts of insidious avatars. Even the insidious cane toad can't try and sneak through quarantine. I learned that you have charged that your company is the victim of an insidious conspiracy masterminded by IBM. But there's nothing laughable about the creature itself, a thoroughly insidious and hateful little beast. Take up whatever insidious sport your smarmy boss has deemed ‘flavour of the month’. What they do is insidious, evil, and downright mean to their addict-victims like my wife. It harbours insidious designs in spite of its declared support for current Palestinian peace efforts. Personally, we can't stand this insidious practise of sneaking adverts into non-commercial formats. The more insidious the plot, the more difficult the cover up, and as the internet grows, so do the unanswered questions. Carol Kane plays the insidious Madame Morrible as the evil twin of Mrs. Slocum from Are You Being Served? Origin Mid 16th century: from Latin insidiosus ‘cunning’, from insidiae ‘an ambush or trick’, from insidere ‘lie in wait for’, from in- ‘on’ + sedere ‘sit’.
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