This is the 1949th most frequent Spanish word.
sentirse
"Sentirse" means "to feel" (referring to emotions or physical states).
In this sentence, 'sentirse' is conjugated in the first person singular and used to express an emotional state.
Me siento feliz hoy.
I feel happy today.
Here, 'sentirse' is conjugated in third person plural and is used to describe the feelings of others due to a reason.
Ellos se sienten emocionados por su viaje.
They feel excited for their trip.
This usage of 'sentirse' appears in a question form, second person singular, asking about someone's physical or emotional state.