Insidious
English Meaning
Lying in wait; watching an opportunity to insnare or entrap; deceitful; sly; treacherous; -- said of persons; as, the insidious foe.
- Working or spreading harmfully in a subtle or stealthy manner: insidious rumors; an insidious disease.
- Intended to entrap; treacherous: insidious misinformation.
- Beguiling but harmful; alluring: insidious pleasures.