Things that hearten you cheer you up. A welcome home party will hearten even the weariest traveler.
You might buy flowers for your grandmother to hearten her after a difficult week, or hearten a shy tap dancer with applause after his routine. Things that encourage or inspire, whether it's the sight of your dog waiting for you outside school or another person's success, can also be said to hearten. The figurative meaning of heart — as in "losing heart" or having a "change of heart" — is at the root of hearten, from the Old English heorte, "heart, soul, or spirit."