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insidious
used in Fahrenheit 451

only 1 use
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Definition
not appearing dangerous, but actually very harmful over time

or:

treacherous  (dangerous due to trickery or from hidden or unpredictable risks)
  • It's an insidious plan, if I do say so myself.
    p. 82.8
insidious = appearing harmless (or even desirable), but actually very harmful over time
There are no more uses of "insidious" in Fahrenheit 451.

Typical Usage  (best examples)
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