形容词

1. 不道德的;道德败坏的
If you describe someone or their behaviour as immoral, you believe that their behaviour is morally wrong.

1. deliberately violating accepted principles of right and wrong

2. not adhering to ethical or moral principles

e.g. base and unpatriotic motives
a base, degrading way of life
cheating is dishonorable
they considered colonialism immoral
unethical practices in handling public funds

Synonym: base