Happily
What it means
Meaning 1
With visible pleasure or a settled feeling of contentment.
Reach for it when describing the joyful manner in which someone acts or lives
The cousins chatted happily while sorting the old photographs.
Meaning 2
With ready and sincere willingness.
Reach for it when offering help or agreement in a friendly, positive way
I would happily show the next group around the garden.
Meaning 3
By fortunate circumstance or with a welcome outcome.
Reach for it when introducing good news that might otherwise have gone differently
Happily, the rain held off until every roof was covered.