1. [adj]  not conforming to approved standards of social or professional behavior; "unethical business practices"
2. [adj]  not adhering to ethical or moral principles; "base and unpatriotic motives"; "a base, degrading way of life"; "cheating is dishonorable"; "they considered colonialism immoral"; "unethical practices in handling public funds"

UNETHICAL is a 9 letter word that starts with U.