Shady
Part of speech: adjective
Definition: Abounding in shades. Causing shade. Overspread with shade; sheltered from the glare of light or sultry heat. Not trustworthy; Unfit to be seen or known.
Example sentence: I go to shady places all the time.
Suspect
Part of speech: noun
Definition: A person who is suspected of something, in particular of committing a crime.
Part of speech: adjective
Definition: To be viewed with suspicion.
Part of speech: verb
Definition: To imagine or suppose (something) to be true without evidence.To distrust or have doubts about (something or someone).To believe (someone) to be guilty without proof.To have suspicion.
Example sentence: One might be led to suspect that there were all sorts of things going on in the universe which he or she did not thoroughly understand.