insidiously adjective
in·sid·i·ous
The adjective form of insidiously is insidious
I iDefinitions
- adjective insidiously intended to entrap or beguile: an insidious plan. 1
- adjective insidiously stealthily treacherous or deceitful: an insidious enemy. 1
- adjective insidiously operating or proceeding in an inconspicuous or seemingly harmless way but actually with grave effect: an insidious disease. 1