Sly

I don't like him because he is sly as a fox.

He is a sly fox.

He appears sly on the surface.

Aren't you the sly one?

She looked at me with a sly smile on her face.

He is a sly old dog.

You're too trusting in your infatuation, Tom. Maria is as sly as a fox.

"But when, through sly Ulysses' envious hate, / he left the light – alas! the tale ye know –, / stricken, I mused indignant on his fate, / and dragged my days in solitude and woe."

I know him. He's a sly, insolent guy.

Yanni is a sly fox.