This is the 9423rd most frequent Spanish word.
alegra
"Alegra" means "makes happy" or "cheers up."
Here, 'alegra' is used as a verb in the third person singular present indicative form, meaning 'cheers up' or 'enlivens', indicating an action that impacts the environment.
Ella alegra la fiesta con su presencia.
She cheers up the party with her presence.
In this sentence, 'alegra' is also a verb but is used impersonally with the pronoun 'me' to express that something brings happiness to the speaker.
Me alegra mucho verte feliz.
It makes me very happy to see you happy.
Here, 'alegra' again takes the form of a verb in the third person singular present indicative form, focusing on its direct impact on others.