Trincheras translates to "trenches," a word often associated with warfare and conflict. It's an evocative and somewhat unexpected word to find in a love song, making it particularly interesting.
In the context of "Siempre," the line "Ya no hay trincheras en mi voz" (There are no longer trenches in my voice) suggests that the presence of the loved one has brought peace and openness. It implies that the singer no longer needs to defend themselves or hide their true feelings, as their partner makes them feel safe and understood.
"Siempre" is about wanting to disappear into one person completely, even if it’s only for one night. The verse builds through small, physical images of surrender: "Morderte el cuello hasta morir" (bite your neck until I die), "Correr descalzos junto al mar" (run barefoot along the sea), before landing on the same three words, "Que siempre, siempre, siempre" (that always, always, always). The song never finishes that sentence. It just repeats the word until the chorus answers it a different way.
The chorus drops the images and says the thing plainly: "Tú, sólo tú" (you, only you), "No me importa nada más" (nothing else matters to me). Everyone else gets folded into one blurry line, "Enredada en los demás" (tangled up with everyone else), while this one night gets to stand on its own: "Que mañana Dios dirá" (tomorrow God will decide). In the second verse the singer calls this person’s heart his home, "Mi patria es hoy tu corazón" (my homeland today is your heart), and says being with her disarms him: "Ya no hay trincheras en mi voz" (there are no more trenches in my voice). By the end the lyrics stop building new lines altogether and just circle "Sólo tú" and "No me importa nada más" until the song fades out on them.