Fiato means "breath" in Italian. While it might seem like a common word, its repeated use in the phrase "senza fiato" (breathless) is central to the song's theme and title.
The song is titled "Senza Fiato," and the lyrics repeatedly express a desire to live life so intensely that it leaves one "senza fiato"—literally without breath, but metaphorically overwhelmed, exhilarated, and fully alive. This makes fiato a powerful and evocative word in the context of the song.
"Senza fiato" ("Breathless") is about choosing to stop overthinking and finally live. The singer is done weighing every option, tallying pros and cons, and asking whether something is right or wrong before he lets himself feel it.
Instead he wants to throw himself into every second like it's the last one there is, even if that means running out of breath. The chorus repeats "rimanere senza fiato" (staying breathless) almost like a mantra, turning the physical feeling itself into the goal: loving or living so intensely that it takes his breath away.
The bridge pushes the idea further. He wants to let go of the past completely, without asking for anything back, and shout so loud that it leaves him breathless too. It's a song about giving in to intensity instead of guarding against it.