Answer:
prayer
Step-by-step explanation:
This is the lyrics translated from Spanish to English and the only word that doesnt show up is prayer.
lyrics:
I do not want to know 
I do not want to know 
Of more problems already 
There's a place 
full of music and fun 
That's why they only invite 
To the young man of the heart 
There is a lot of harmony, always joy 
There is a lot of harmony, always joy