Manantial translates to "spring" or "fountain," referring to a natural source of water. It's a beautiful and evocative word that isn't heard in every pop song.
In "Confía," Diego Verdaguer uses manantial metaphorically to describe the origin of his love. He sings, "Que nace de mi alma, de un manantial de amor" (That is born from my soul, from a spring of love), suggesting his love is pure, abundant, and flows endlessly from within him. This poetic imagery makes the word stand out.