Sneaksome

He might have gone one step further and shown who were the substitutors, who the pirates, and if the description "that sneaksome imp of darkness" would not be more applicable to that firm which evidently wish to supplant English pharmacy and English pharmacists.

They follow us all the way to the wood shore, and I've rarely seen such skill. Nearly as sneaksome as I am.

“If it's here, it's hidden good and sneaksome, snuglets,” he muttered.