IPA: /ˈɡlædli/
KK: /ˈɡlædli/
In a happy or willing way; with pleasure.
She gladly accepted the invitation to the party.
Gladly → It is formed from "glad" (from Old English *glæd*, meaning joyful or happy) and "-ly" (meaning in a manner of). The word "gladly" means in a joyful or happy manner.
Think of being 'joyful' ('glad') and doing something 'in that manner' ('-ly'). This helps you remember that 'gladly' means to do something in a joyful way.