Heartache is the deep sadness or emotional pain that comes from loss, disappointment, or hurt feelings. Despite having “heart” in its name, heartache isn't a physical pain in your chest. It's the heavy, aching feeling that spreads through you when something important to you goes wrong.

You might feel heartache when a close friendship ends badly, when a beloved pet dies, or when you don't make the team after working so hard. It's different from ordinary disappointment because it touches something you really care about. Missing out on dessert feels frustrating, but that's not heartache. Losing a friendship you treasured for years? That's heartache.

The word captures how emotional pain can feel surprisingly physical. When you experience heartache, you might feel tired, have trouble sleeping, or notice a genuine heaviness in your chest. Writers and poets have used this word for centuries because it perfectly describes that specific kind of sadness that seems to hurt everywhere at once.

Heartache eventually fades as you heal, though it might leave you wiser about what and who matter most to you. Some of life's most meaningful experiences involve risking heartache, whether that's caring deeply about someone, trying your hardest at something difficult, or loving something you might one day lose.