Sneaky (adjective)

Coy, deceitful, underhanded, or stealthy in behavior.

Origin:

Derived from the word "sneak".

Examples:

1. He was sneaky when he took the cookies from the jar.
2. She was sneaky when she tried to avoid her responsibilities.
3. He was sneaky when he tried to cheat on the exam.
4. The sneaky salesman tried to trick her into buying the more expensive car.
5. The sneaky dog was always taking things without getting caught.