insidious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Times columnist Patt Morrison, Smoglandia traces the rise, impact, and retreat of the city’s most insidious pollution.

From Los Angeles Times • Mar. 26, 2026

The most insidious battle, however, was the military leadership.

From BBC • Mar. 5, 2026

"The cold is a very insidious enemy, it should not be underestimated," she said.

From Barron's • Feb. 16, 2026

And while this image of a police chief is at odds with the much more varied and often insidious, violent truths of police work, Marge is a character torn right out of a Midwestern reality.

From Salon • Feb. 7, 2026

The breaches threatened the lives of agents and created insidious doubts, with officials questioning each other’s loyalty.

From "Killers of the Flower Moon" by David Grann