Ermetica literally means 'hermetic' or 'airtight', but in this context, it's used to describe someone who is enigmatic, mysterious, or closed off emotionally. It's a less common and more evocative word than simply saying 'reserved' or 'shy'.
The lyrics ask, "Perché fai l'ermetica?" (Why are you being so enigmatic?), highlighting the speaker's frustration or curiosity about the other person's guarded nature. This word adds a layer of intrigue and depth to the interaction, making it particularly interesting for learners.
Two people keep almost saying the right thing to each other and never quite manage it. He works as a ghost in abandoned villas, borrowing them "per dare le feste più tristi di sempre" (to throw the saddest parties ever). She is the daughter of a sorceress and a lion tamer, born on stage. Every time he tries to pin her down the question comes out the same way, "Resti qui? Te ne vai?" (Are you staying? Are you leaving?), and the answer he gets back is a tarot deck, a Ouija board, an Edgar Allan Poe story she disappears into.
The chorus is the joke the title sets up. He apologises three times in three languages, then admits the problem, "Conosco mille lingue, ma non la tua" (I know a thousand languages, but not yours). What makes it land is the running gag underneath, where each thing they rent gets a little more final: first a cinema just to look at each other, then a funfair to fall into the void, and at last "Affittiamo un cimitero solo per ballare da soli" (Let's rent a cemetery just to dance alone). The band plays all of it as bright summer pop, which is exactly why that last line stings.