noun
guile
GYLE/ɡaɪl/
Clever trickery used to deceive others.
The con artist uses guile to win his victims' trust.

Etymology
Old French guile covered both deceit and a ruse or trick. The modern sense preserves that connection between deception and the crafty means used to carry it out.
In context
“Because he was gentle,” cried Nigel, “because he had no thought of trick or guile.”
More examples
- With charm and guile, she tricks us into doing her work.
- His innocent questions hide a good deal of guile.
- She answers without guile, unaware that the truth might offend him.
Forms
guile
guileful adjective — Using clever tricks to deceive others.
guileless adjective — Honest and free from deceptive intentions.