alegrar
/aleˈɡɾaɾ/ · A1 · verb
to make happy
🎉 alegrar = to make alegre (happy); same root as musical allegro
From alegre (happy, cheerful), which shares a Latin root (alacer, lively) with Italian allegro, the brisk and cheerful tempo marking. Me alegro means I am glad; alegrar a alguien means to cheer someone up.