Aggrovigliare means 'to tangle' or 'to snarl'. It's a vivid verb that paints a picture of something becoming twisted and complicated, like a knot of threads.
In the song, the lyrics say, "Certi fili del discorso si possono aggrovigliare" (Certain threads of conversation can get tangled). This metaphor beautifully describes how discussions or thoughts can become confused and difficult to unravel, making it a unique and memorable word in this context.
Olly starts with a distinction people usually skip: "E tra volersi e tollerarsi" ("And between wanting each other and putting up with each other"), "C'è una differenza grande" ("There's a big difference"). Then he hands the whole problem to the water. "Ma menomale che c'è il mare" ("But thank God there's the sea"), "Che ci porta ogni pensiero" ("That carries every thought"), "A mischiarsi con il cielo" ("To mingle with the sky"). The thought goes up, mixes into the sky, and never comes back. It is a very Genoese way to settle an argument, and JVLI's production keeps the whole thing at beach-radio volume instead of building to a big emotional finish.
The chorus is an invitation with almost nothing in it: "Se cerchi un posto bellissimo" ("If you're looking for a beautiful place"), "Basta che ti metti qui con me" ("Just sit here with me"), "Senti, i pescatori che fischiano" ("Listen, the fishermen whistling"). The fishermen's whistle then becomes the la-la-la everybody sings, and the promise attached to it is deliberately small: "E tutto si risolverà" ("And everything will work out"). The bridge is where the song says what it means by loving someone, and it stays nautical. "Ti vuole bene chi conosce" ("The one who loves you is the one who knows"), "I tuoi punti deboli" ("Your weak spots"), "Ma non li tocca" ("But doesn't touch them"). Then "Chi quando affondi a prua" ("Who, when you sink at the bow"), "Ti bilancia stando in poppa" ("Balances you from the stern"). Someone standing at the other end of the boat so it stops tipping.