sly

/slaɪ/
adjective
  1. Having or showing a cunning and deceitful nature; able to get what you want in a clever, often dishonest way.
    • The sly fox managed to steal the farmer's chickens without being seen.
    • The salesman was so sly that he convinced people to buy things they didn't need.
    • She gave a sly smile when she realized she had tricked her brother into doing her chores.
  2. Done in a secret or sneaky way, often to avoid being noticed.
    • He took a sly glance at the test answers when the teacher wasn't looking.
    • The cat made a sly move toward the mouse, creeping slowly across the floor.
    • They exchanged sly whispers during the movie, trying not to disturb others.
Antonyms
What does "sly" mean? | whatsthatwordmean | whatsthatwordmean