Lacking scruples or principles
It would be unethical to conduct dangerous medical experiments without the full consent of the participants.
It is unethical to discriminate against people because of their culture or gender.
The surgeon was punished for her unethical advances towards her patient's husband.
I avoid spending money at companies that practice unethical business methods, such as employing child laborers.
Government officials are finally determined to weed out unethical conduct from their midst.