Fiumiciattolo is a charming and somewhat uncommon word that means 'brook' or 'small river'. It's a diminutive of fiume (river), adding a sense of smallness and intimacy.
In the song, the artist uses it in the line "Come i salici nel fiumiciattolo" (Like the willows in the brook). This imagery evokes a peaceful, natural scene, making the word stand out and adding a poetic touch to the lyrics.
"ACQUA" is a summer song that keeps slipping between images of water, and Mace's woozy production lets Rkomi and Madame drift through it. The hook is the line that sticks: "Casco come acqua tra le rocce" [I fall like water between the rocks]. Cascare is a casual way to say "to fall", and the picture is of someone tumbling for another person the way a stream drops over stones, with no real choice about it. Right after comes "Come le ginocchia al suono della campanella" [like knees at the sound of the school bell], which is a lovely, slightly silly image: going weak at the knees the way a kid jumps up when the bell rings.
The verses are a pile of beach and sea pictures: "I piedi sulla sabbia come una conchiglia" [feet in the sand like a seashell], "I tuoi capelli come alghe" [your hair like seaweed]. There is real flirting here too. "Ti prometto il mare con uno shottino d'acqua" [I promise you the sea with a little shot of water] is a cheeky joke about promising everything and delivering almost nothing, and "Ti va di passarci una notte con me?" [do you feel like spending a night with me?] is about as direct as an invitation gets. Learners should grab two everyday idioms: "Te ne lavi le mani" [you wash your hands of it] means you refuse responsibility, exactly like in English, and "non restarci male" [don't be hurt by it] is what Italians say when they mean "don't take it badly". The chorus line "Ti comporti come farei io... se non guarda nessuno" [you act the way I would... if nobody's watching] is my favourite bit: the other person behaves with the freedom the singer only allows himself in private.