IPA: /ˈfaʊli/
KK: /faʊli/
In a way that is unpleasant, offensive, or morally wrong.
He spoke foully about his opponents during the debate.
Foully → It is formed from "foul" (from Old English *fūl*, meaning offensive or dirty) and "-ly" (meaning in a manner of). The word "foully" means in an offensive or dirty manner.
Think of something being 'offensive' or 'dirty' ('foul') and how it is done 'in a manner' ('-ly'). This helps you remember that 'foully' describes an action done in an offensive way.