Recapacita is the command form of the verb recapacitar, meaning "to reconsider" or "to think again." It’s a powerful and dramatic plea, urging someone to change their mind about a serious decision.
In the song, the singer crashes a wedding and begs his former lover, the bride, to call it off. His cry of “Mi amor, por Dios, recapacita” (My love, for God's sake, reconsider!) is the emotional turning point of the story, packed with the desperation and hope of winning her back. This single word encapsulates all the drama of a classic telenovela scene.
Picture the ultimate telenovela scene set to a bachata beat: the priest asks if anyone objects to the marriage, and lead singer Romeo Santos crashes the ceremony shouting, "¡Yo me opongo!" ("I object!"). From that second on, the track turns into a high-drama confrontation where he refuses to let his ex marry another man. He begs the priest to pause the wedding, calls the groom an "estúpido en el altar" ("idiot at the altar"), and tells the entire congregation that this ceremony is just a bad dream.
What makes this track so wildly entertaining is how far he goes to prove their history. He brings up their childhood pacts, climbing through her window while avoiding her barking dog, hiding under her bed from her mother, and sneaking off in school ("en el baño, piso cuatro, to' los días dos y cuarto" / "in the fourth-floor bathroom, every day at 2:15"). He even drops the famous Mexican catchphrase "no contaban con mi astucia" ("they didn't count on my cleverness", made famous by the TV character El Chapulín Colorado) to brag about sneaking into her house. By the end, he calls the whole wedding a theater piece starring "una hipócrita y un payaso" ("a hypocrite and a clown"), insisting that a true soldier goes down fighting for love.