IPA: /ɪˈmɔːrəli/
KK: /ɪˈmɔrəli/
In a way that is not morally right or acceptable; behaving in a wrong or unethical manner.
He acted immorally by cheating on the test.
Immorally → It is formed from "im-" (meaning not) and "moral" (from Latin "moralis", meaning pertaining to manners or ethics) and the suffix "-ly" (meaning in a manner). The word "immorally" means in a manner that is not ethical or contrary to moral principles.
Think of 'not' ('im-') behaving according to 'moral' standards — that's why 'immorally' means acting in a way that goes against ethics.