Unethical
Part of speech: adjective
Definition: Not morally approvable; morally bad; not ethical.
Example sentence: What is the difference between unethical and ethical advertising? Unethical advertising uses falsehoods to deceive the public; ethical advertising uses truth to deceive the public.
Dishonorable
Part of speech: adjective
Definition: Without honor, or causing dishonorLacking respect or ethical principles
Example sentence: One of the common failings among honorable people is a failure to appreciate how thoroughly dishonorable some other people can be, and how dangerous it is to trust them.