Infrante means "shattered" or "broken". It's a strong and evocative past participle that you don't encounter in every Italian song, making it quite memorable.
In the context of "Foto", the line "Le linee sono infrante" (The lines are shattered) likely refers to the breaking down of boundaries or conventional structures within the timeless space of a photograph. It suggests a liberation from rigid rules, emphasizing the profound and perhaps unconventional nature of the love captured in the image.
"Foto" is Giordana Angi's quiet promise to love someone through whatever comes next. She sings about losing herself in another person's sense of time, tracing the feeling back to a memory of Rome, and making one simple vow: if we change, we change together, and if we end, we end together.
The chorus holds the song's whole idea in one image, a photo where the two of them stay immortal no matter what happens outside its frame. It isn't really about the picture. It's about wanting one connection to outlast time itself.
The second verse turns more physical, all shaken feelings and closeness, but the song keeps circling back to that same photograph, repeating it like a vow she needs to say more than once to believe it.