IPA: /nɒnˈɛθɪkəl/
KK: /nɑnˈɛθɪkəl/
Not conforming to accepted standards of morality or principles of right and wrong.
The company's nonethical practices led to public outrage and protests.
Nonethical → It is formed from "non-" (meaning not) and "ethical" (from Greek "ethikos", meaning moral or relating to ethics). The word "nonethical" means not moral or not conforming to accepted standards of ethics.
Think of 'not' ('non-') being combined with 'moral' ('ethical') to remember that 'nonethical' refers to something that is not moral.