Inigualable means 'unequaled' or 'unparalleled'. It's a powerful adjective used to describe something or someone so unique that they have no equal.
In this song, the singer uses this word to express the profound and singular beauty of the person he loves, stating, "Como tú no hay nadie, eres inigualable" (There's no one like you, you are unequaled). It perfectly captures the depth of his admiration and makes the word truly stand out.
In "Diciembre", Mexican-American group Eslabón Armado gives you the ultimate confession of someone who has it bad for a crush and is completely shameless about it. Right from the start, the singer calls himself a "Don nadie" ("Mr. Nobody"), admitting he feels totally out of her league while still promising to pull down the moon for her. He dreams about her, scribbles drawings of her face, and falls completely for her "ojazos" (an affectionate, exaggerated way to say "big, beautiful eyes"). The grand prize he wants by the end of the year? Just having her around to spend the winter holidays together: "Compartir contigo diciembre" ("To share December with you").
What makes this track fun is how delightfully over-the-top his romantic bargaining gets. He literally begs her to name her price: "Ponme un precio y daría todo por tu amor" ("Put a price on it and I would give everything for your love"). It sounds blunt, almost commercial, but he backs it up with classic serenading bribes. He offers to hire live musicians—promising "banda o un norteño" (a brass-heavy banda group or an accordion-led norteño outfit)—plus giant teddy bears and roses. He is head over heels ("bien loco"), and while swearing to the skies that he will never break her heart, all he really wants is to look at the night stars and wake up seeing her smile.