Umbral translates to "threshold." It's a less common, more poetic word than a simple "door" or "entrance," making it stand out.
In the song, León Larregui sings about "Brillando en el umbral" (Shining on the threshold). This evokes a sense of being on the verge of something new and significant, a liminal space where love is just beginning to unfold, adding a layer of mystery and anticipation to the lyrics.
"Amantes" ("Lovers") is León Larregui's ode to being completely absorbed in someone.
The song opens with two lovers close together under neon lights in the dark, one begging the other not to let go. From there it builds into a series of cosmic images: a single beauty mark on the loved one's skin becomes a star, and their whole body becomes an entire universe, and later an entire sky.
The chorus turns that devotion into shelter. The singer surrenders completely, like rivers running to the sea, and calls the other person their peace in the middle of war and their solid ground in a storm. They are described as both the fire and the up-and-down of the singer's whole world, present on every side at once.
It is a love song built from scale: something as small as a beauty mark expands until it fills the sky, mirroring how consuming this love feels.