Zăvorul translates to "the bolt" (as in a door bolt). It's an interesting and somewhat uncommon word to find in song lyrics, making it stand out.
In the context of the song, it represents the protagonist's attempt to keep her true self hidden and locked away. The line "Zăvorul tras și încuiat, dar au aflat" (The bolt drawn and locked, but they found out) powerfully conveys her struggle to maintain a facade before ultimately embracing her freedom and true identity.
This song is a powerful anthem about breaking free and finding your own strength. The singer, Dalma Kovacs, describes a hidden kingdom of snow, an "împărăția mea" [my kingdom], which reflects the storm inside her. For a long time, she tried to be the perfect person everyone wanted, telling herself "Fata bună tu trebuie să fii" [You must be the good girl]. She tried to lock her true self away, but it was no use.
The chorus is this amazing moment of release: "S-a întâmplat, s-a întâmplat / Eu nu am mai rezistat" [It happened, it happened / I couldn't resist anymore]. She's done hiding. She decides that what other people think is "nu e treaba mea" [not my business] and embraces the cold, declaring "de azi gerul e prietenul meu" [from today the frost is my friend]. It's a song about leaving the past behind, discovering your own power, and finally being free.