insidious
/ɪnˈsɪdi.əs/
adjective
- 1
Producing harm in a stealthy, often gradual, manner.
- 2
Intending to entrap; alluring but harmful.
“Hansel and Gretel were lured by the witch’s insidious gingerbread house.”
- 3
Treacherous.
“The battle was lost due to the actions of insidious defectors.”
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