sleighly

Etymology
From.

Adverb

 * 1) Judiciously, consideredly, shrewdly; in a wise way.
 * 2) Adeptly, expertly, in an expert or skilled way.
 * 3) Attentively; with care, attention or discernment.
 * 4) Slyly, artfully; intelligently and using deception.
 * 5) Without being noticed or detected; covertly.
 * 1) Without being noticed or detected; covertly.