slily

"I'd like a little nip of something to cure the belly-ache," he answered slily.

As his back was turned, Si reached slily up to a shelf, pulled down a pack of cards, and flung them behind the back-log.

Did some conservative curator slily conceal them before the fatal mandate was executed?

Jorian lay still on his pallet and slily kicked Boris, hoping that he would rise and take upon him the task of shutting it.

He was passing his arm softly about a girl's waist—slily also, lest her mother should see.