IPA: /ˈhiːnəsli/
KK: /ˈhiːnəsli/
In a very bad or shocking way that is morally wrong or evil.
The crime was committed heinously, leaving the community in shock.
Heinously → It is formed from "heinous" (from Old French *hainous*, meaning hateful or abominable) and the suffix "-ly" (meaning in a manner of). The word "heinously" means in a manner that is hateful or abominable.
Think of something that is 'hateful' ('heinous') and how it is done 'in a manner' ('-ly'). This helps you remember that 'heinously' describes actions that are done in a hateful way.