Words To Describe Deceitful Behavior

adjective adjective describes a noun or pronoun, in this case, 'knavish' describes someone who is dishonest or deceitful

• The knavish man was caught stealing from the store.
• That knavish guy is always up to no good.
• I don't trust that knavish fella, he gives me bad vibes.
• Her smile was as knavish as a fox's, hiding her true intentions.

adjective an adjective describes a noun or pronoun; 'janus faced' describes someone who is two-faced or deceitful

• The politician's janus-faced behavior was evident as he spoke differently to different groups of people.
• I don't trust her, she's so janus-faced, always saying one thing and doing another.
• I can't stand that janus-faced friend of yours, always gossiping behind people's backs.
• The mirror reflected a janus-faced image, showing both the light and dark sides of the person's personality.