Ingrato translates to "ungrateful" or "thankless". It's a strong word that conveys a sense of regret and self-reproach, making it more impactful than common adjectives.
In "Por Un Beso," the singer uses ingrato to describe himself: "Fui ingrato para entregarlo todo" (I was ungrateful to give my all). This reveals a deep internal conflict where he feels he didn't appreciate or reciprocate the love given, adding a layer of emotional complexity to the song's narrative about a love that wasn't fully realized.
This song is all about falling way too hard for something way too small: just one little kiss on the cheek. The singer says that “por un beso / que no fue en los labios” [for a kiss that wasn’t on the lips] was enough for him to give everything. He admits he was “ingrato / para entregarlo todo / por un beso” [foolish / to give it all / for one kiss], and you can feel him shaking his head at himself. That one “beso en la mejilla” [kiss on the cheek] made him think she felt the same, so he “regalé mi alma” [gave you my soul] and started “soñar despierto” [daydreaming] and feeling completely in love “en cuerpo y alma” [in body and soul].
The painful part is that she never gives him anything more. “No me diste / ningún otro motivo / solo un beso” [you didn’t give me / any other reason / just one kiss], and now he realizes it was “muy poco para estar enamorado” [too little to be in love]. He calls his own hopes “falsas esperanzas” [false hopes], but he can’t just switch his feelings off. He still says “el problema es que te extraño y me haces falta” [the problem is that I miss you and I need you] and “el problema es que te sueño y que te adoro” [the problem is that I dream about you and adore you]. So the song sits in that frustrating place where your head knows it was only one small moment, yet your heart is already all in.