insidia

Etymology 1
From.

Noun

 * 1) trick, trap
 * 2) (hidden) danger, peril
 * 1) (hidden) danger, peril

Etymology
See the entry for.

Noun

 * 1)  ambush
 * 2)  artifice, plot, snare, stratagem
 * 1)  artifice, plot, snare, stratagem