Impertinenza translates to "impertinence" or "insolence." It's a word that suggests a lack of respect or proper behavior, often in a playful or cheeky way.
In the song, the line "Non fare caso a quest'impertinenza" (Don't pay attention to this impertinence) is particularly intriguing. The singer seems to be dismissing something they've just said or done as a minor transgression, adding a layer of self-awareness and perhaps a hint of mischief to the lyrics. It's not a word you hear every day, making it stand out.
"Attenta" ("Be Careful") is Negramaro's warning to a lover about a relationship that has become too intense to handle safely. The singer keeps repeating "stai attenta" - not as a threat, but as an honest heads-up that things in this room have gone further than either of them meant.
He admits his own guilt too. He describes a kiss with no innocence left in it, a heart he took from someone else, and a night neither of them can walk away from without consequences. The room itself starts to move, the floor feels like sand against the sky, and a train is already leaving whether they close their eyes to it or not - all images of a situation slipping out of anyone's control.
Underneath the warning is a genuine kind of tenderness. Everything around them is beautiful, almost like a miracle, and that is exactly why he tells her to be careful: not because the love is fake, but because it is real enough to hurt them both.