General:
* Sournois (pronounced "soor-nwa") - This is the most common and direct translation for "sneaky". It implies a sense of deception and cunning.
Other options:
* Rusé (pronounced "roo-zay") - This translates to "crafty" or "sly", but can also convey "sneaky" depending on the context.
* Furtif (pronounced "foor-teef") - This means "stealthy" or "secret", and can also be used to describe a sneaky action.
The best translation will depend on the specific situation and the nuance you want to convey.