sly

adjective

UK /slaɪ/

US /slaɪ/

Clever in a sneaky way.

The sly fox quietly took the food.

SYNONYMS

cunning crafty sneaky tricky wily

RELATED WORDS

clever secret shifty mischievous

OTHER MEANINGS

2. Done in a secret or playful way.

She gave him a sly smile.

3. Smart at tricking people.

He was too sly to be caught.

4. Showing a hidden joke or meaning.

He made a sly comment about the surprise.