Extranjero literally means "foreigner" or "stranger". It's a word that evokes a sense of displacement and not belonging.
In this song, the singer uses it metaphorically to describe feeling like a stranger in his own city after a breakup. He sings, "Y hoy me siento como extranjero en nuestra propia ciudad" (And today I feel like a stranger in our own city), powerfully conveying his emotional disconnection and loss of familiarity in places once shared with a loved one. This makes it a poignant and memorable word.
Iñigo Quintero's "Extranjero" is a really heartfelt song about the pain of a breakup and trying to move on. The singer is clearly struggling, asking, "¿Cómo se olvida toda una vida?" [How do you forget a whole life?]. He feels completely lost and disconnected, even in his own city, which now feels unfamiliar, like he's a "extranjero en nuestra propia ciudad" [foreigner in our own city].
He's desperate to turn back time, wishing this wasn't the end and longing to see his ex again. The silence from the other person is really getting to him, feeling "eterno" [eternal]. Every street brings back a memory, making it hard to escape the sadness. He even suggests they just leave everything behind and run away together: "Déjalo todo y vente conmigo / Donde nadie nos pueda encontrar" [Leave everything and come with me / Where no one can find us]. It's a really emotional look at how hard it is to let go when a relationship ends.