What is a synonym for the word shady?

The best synonym for "shady" depends on the context. Here are some options:

If you mean "suspicious":

* Dubious

* Questionable

* Dishonest

* Deceptive

* Underhanded

* Unreliable

* Untrustworthy

* Sketchy

If you mean "providing shade":

* Umbrageous

* Overcast

* Cool

* Sun-protected

* Sheltered

If you mean "dark and obscure":

* Dim

* Gloomy

* Dark

* Mysterious

* Secretive

If you mean "unscrupulous":

* Corrupt

* Criminal

* Dishonorable

* Unethical

* Disreputable

If you mean "uncertain":

* Unclear

* Ambiguous

* Vague

* Doubtful

Please provide more context about how you are using the word "shady" so I can give you a more specific synonym.