Other forms: warmheartedly
If you're a friendly, open, and kind person, your friends might describe you as warmhearted. It would be a warmhearted gesture if you shared your lunch with the kid who's always forgetting to bring hers.
This adjective was first used around 1500, and it's a close relation to kindhearted. When warm is used to describe feelings, it means "expressing affection or kindness." So whenever someone acts out of tenderness or good will, as if their heart were full of kindness, they're warmhearted. A warmhearted bus driver gives each passenger a genuine smile, and a warmhearted story leaves you feeling content and happy.