Empaña means 'fogs up' or 'tarnishes'. It's a less common verb in song lyrics, making it stand out.
In the song, the artist sings, "El espejo es fácil de ver, solamente cuando se empaña" (The mirror is easy to see, only when it fogs up). This line uses the physical act of a mirror fogging up as a metaphor for clarity often only coming after a period of difficulty or obscured vision in life or relationships.
In "Siempre," which means "Always," the Venezuelan duo 3AM explores the painful aftermath of a lost love. The song is a raw confession of regret and loneliness, built around the classic idea that "you don't know what you've got 'til it's gone." The singer reflects on how he took a special relationship for granted, only realizing its true value after it ended. He admits to losing himself while trying to make others proud, creating a gap between how he appeared and how he truly felt inside.
The lyrics reveal a deep struggle with self-acceptance, which was made easier by a person who loved him just as he was. Losing this person feels as difficult as learning to accept himself. Now, he's left with an emptiness that a promise of "forever" couldn't fill. The song is a heartfelt message to this lost love, telling them that no matter where they are, he will siempre—always—love and miss them, even if he never sees them again.