Calavera literally means "skull," but in Mexican culture, it's often a symbol for death itself, especially in a more personified or artistic sense, like the famous 'Calaveras Catrinas' during Day of the Dead.
In this song, the lyric "Te cae la calavera y de salvarte no hay manera" (The skull falls on you and there's no way to save yourself) uses calavera to represent the sudden, inescapable arrival of death. It's a vivid and culturally rich word that adds a unique depth to the song's reflection on mortality.
In "Eternamente," which means "Eternally," Mexican rapper Santa Fe Klan delivers a heartfelt tribute to someone who has passed away. The song is a raw mix of grief and loyalty, painting a picture of life in his neighborhood, Santa Fe. He pours a drink on the ground for the lost one and describes his cold nights and a heart of ice, feeling lost without their love.
The chorus is a powerful promise: "Los días pasan, recuerdos quedan aquí en mi mente / Yo te recuerdo siempre, hasta la muerte, eternamente." This translates to, "The days pass, memories remain here in my mind / I remember you always, until death, eternally." Throughout the song, he contrasts this deep sense of loss with the tough reality of street life, mentioning police, working hard every day, and the pride he has for his crew and his barrio. It's a song about how memories stay with you forever, even when life is hard and unpredictable.