English
Adjective
en-adj
- Producing serious harm in a stealthy, often gradual, manner.
#: He was unaware that an insidious cancer was consuming him.
- Intending to entrap.
#: Hansel and Gretel were lured by the witch's insidious gingerbread house.
- treacherous|Treacherous.
#: The battle was lost due to the actions of insidious defectors.
Related terms
insidiously
insidiousness
References
R:Webster 1913|insidious
R:Dictionary.com|insidious
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