Disreputable - umbrageous (5)
I believe the answer is:
shady
I believe this is a double definition.
'disreputable' is the first definition.
(similar in meaning)
'umbrageous' is the second definition.
(I know that umbrageous can be written as shady)
(Other definitions for shady that I've seen before include "Suspicious, fishy" , "underhand" , "Dubious (of character)" , "Questionably legal" , "Disreputable -- out of the sun" .)