Taken, done, used, etc., surreptitiously or by stealth; secret: (Dictionary.com)
Sly; shifty: (Dictionary.com)
In a way that attempts to avoid notice or attention; secretively. (Oxford Dictionaries)
(of people) behaving secretly and often dishonestly, or (of actions) done secretly and often dishonestly: (Cambridge Dictionary)
Furtive – meaning of the word. Membean.
Furtive glances from the sun Wednesday, rain possible.