Cannily

careful; cautious; prudent:
a canny reply.
astute; shrewd; knowing; sagacious:
a canny negotiator.
skilled; expert.
frugal; thrifty:
a canny housewife.
Scot.

safe to deal with, invest in, or work at (usually used with a negative).
gentle; careful; steady.
snug; cozy; comfortable.
pleasing; attractive.
Archaic. having supernatural or occult powers.

in a canny manner.
Scot. carefully; cautiously.
Contemporary Examples

Choose Your Own Neil Patrick Harris: The Star on ‘Doogie,’ ‘Gone Girl,’ Gay Sex and More Kevin Fallon October 9, 2014
‘House of Cards’: Should You Binge-Watch Netflix’s Political Drama? Jace Lacob February 4, 2013

Historical Examples

Empire Builders Francis Lynde
Dear Enemy Jean Webster
The Lash Olin L. Lyman
Satan and the Comrades Ralph Bennitt
The Woman from Outside Hulbert Footner
The Cloister and the Hearth Charles Reade
Three Plays Luigi Pirandello
Shandygaff Christopher Morley

adjective -nier, -niest
shrewd, esp in business; astute or wary; knowing
(Scot & Northeast English, dialect) good or nice: used as a general term of approval
(Scot) lucky or fortunate
adverb
(Scot & Northeast English, dialect) quite; rather: a canny long while
adj.

The Canny Scot is so well known as scarcely to require description. He carries caution, cunning, and selfishness to excess. Deceitful when a purpose is to be accomplished, he is not habitually deceitful. One thing he never loses sight of–his own interest. But of his own interest he is not the most enlightened judge. [“The Natural History of Scotsmen,” in “The Argosy,” December 1865]

Related: Cannily; canniness.