Unscrupulous (adjective) — عديم الضمير: Having no moral principles. Below are 7 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
Dishonest; fraudulent; contaminated; impure; degraded; tainted; spoiled; unethical
Bent shape; twisted form; dishonest behavior; curved line; warped structure; irregular path; corrupt conduct; distorted appearance
showing a skillful use of underhanded tactics to achieve goals; also, departing from the most direct path; circuitous
unprincipleddishonestunethicalshameless
An unfair, cruel, or personal attack — a remark or move that hits private wounds instead of arguing the real issue (from boxing fouls)