Origin of insidious
Can be confusedinsidious invidious
Examples from the Web for insidious
The act of erasure through mis- or under-representation is an insidious one.
Its insidious reach enters into medical offices and chokes off the free-speech rights of the people trying to work there.
Cancer is the most pernicious, insidious, disgusting disease of life.Pierce Brosnan’s Life After Bond: From Action Hero to Losing His Daughter to Cancer|Tim Teeman|July 2, 2014|DAILY BEAST
However, an insidious form of segregation, happening within the educational system, belies this simplistic view.
This would be dismissible, but it actually had an insidious impact.
The insidious revolt led by Buck had destroyed the solidarity of the team.The Call of the Wild|Jack London
That last deceptive stage of his insidious disease had given him a fictitious strength.The Ebbing Of The Tide|Louis Becke
And we know what are the paths by which Athenian aggression travels, and how insidious is its progress.The History of the Peloponnesian War|Thucydides
I never dreamed of jealousy, Alfred Bernard, or I might have seen beforehand the wiles of the insidious tempter.Hansford: A Tale of Bacon's Rebellion|St. George Tucker
At the next meeting of parliament, the king agreed to omit these insidious words, p. 168.