1) Amoral 2) Dishonest 3) Dishonorable 4) Dishonourable 5) Immoral 6) Unethical 7) Unscrupulous 1) Corrupt 2) Depraved 3) Dishonourable 4) Disreputable 5) Having little or no integrity 6) Immoral 7) Unethical 8) Unprincipled behavior 9) Unscrupulous 10) Wrong 
• (a.) Being without principles; especially, being without right moral principles; also, characterized by absence of principle.
[adj] - lacking principles or moral scruples 2. [adj] - having little or no integrity
unprincipled Lacking principles or moral scruples; unscrupulous: unprincipled behavior.
adjective having little or no integrity
lacking or not based on moral scruples or principles: an unprincipled person; unprincipled behavior. · not instructed in the principles of something (usually fol. by in).
[SAT terms] lacking moral scruples