Acrecentando comes from the verb acrecentar, meaning "to increase" or "to grow". It's a more formal and evocative word than common synonyms like creciendo.
In the song, the singer uses it to describe how his love is constantly expanding and intensifying: "Porque se va acrecentando y entre más besó tus labios mucho más me va gustando" (Because it keeps growing, and the more I kiss your lips, the more I like it). This word beautifully conveys the depth and ever-growing nature of his affection.
This song, "Mas Enamorado" by Los Cadetes De Linares, is all about a love that just keeps growing stronger! The singer tells us his love for this person is constantly increasing, saying "entre más besó tus labios mucho más me va gustando" [the more I kiss your lips, the more I like it]. It's a really sweet and direct way to say that every moment with them makes him fall even deeper.
He describes his love as incredibly pure and sincere, like crystal and "como las aguas clases de las entrañas del suelo" [like the clear waters from deep within the earth]. He feels this love is so deeply ingrained that "en vez de quererte menos estoy más enamorado" [instead of loving you less, I am more in love]. He even compares his love to the immense sea, impossible to measure, showing just how vast and boundless his feelings are. It's clear this person has completely captured his heart!