IPA: /ˈmædli/
KK: /mædli/
In a way that is crazy or extremely enthusiastic; often used to describe actions done with great intensity or without thinking clearly.
She danced madly at the party, losing herself in the music.
Madly → It is formed from "mad" (from Old English *gemædde*, meaning insane or crazy) and "-ly" (meaning in a manner of). The word "madly" means in a manner that is insane or crazy.
Think of someone acting 'crazy' ('mad') and doing it 'in a manner' ('-ly'). This helps you remember that 'madly' describes doing something in a crazy way.