One entry found for insidious.

Main Entry: in·sid·i·ous
Pronunciation: in-sid--s
Function: adjective
1 a : awaiting a chance to trap : TREACHEROUS <an insidious foe> b : harmful but attractive <an insidious habit>
2 : having an effect that develops gradually <an insidious disease>
- in·sid·i·ous·ly adverb
- in·sid·i·ous·ness noun

Pronunciation Symbols