Unsavory (adjective)

1. Having a disagreeable or unpleasant taste, smell, or appearance.
2. Not appealing or attractive.
3. Having a negative, unpleasant, or unethical character or quality.
4. Morally or ethically questionable.

Origin:

Late 16th century: from un- (expressing negation) + savory, on the pattern of savory.

Examples:

1. The unsavory dish was not consumed by the guests.
2. The unsavory conditions of the prison were widely known.
3. The unsavory reputation of the politician was well established.
4. The unsavory details of the crime were not revealed to the public.
5. The unsavory characters were avoided by the decent people.