Aterra comes from the verb aterrar, meaning "to terrify" or "to scare". It's a strong emotional word that conveys a deep sense of fear.
In this song, the singer uses aterra to express his profound fear of waking up alone and not having his loved one by his side. He sings, "me aterra pensar que mañana despertador no vender aquí" (it terrifies me to think that tomorrow the alarm clock won't ring here), highlighting the emotional weight of his potential loss.
La Fiera De Ojinaga brings us a heartfelt tune in "Al Despertar" that's all about regret and the pain of a love lost. The singer looks back, wishing they had set aside their pride to tell someone they loved them. Now, they're terrified of waking up tomorrow and not having that person there, thinking, "me aterra pensar que mañana despertador no vender aquí ella marino lo compre" [it terrifies me to think that tomorrow the alarm clock won't sell here, she bought it]. It's a really relatable feeling of realizing what you had only after it's gone.
They remember the good times, calling the relationship "lo más grande que he tenido en esta vida" [the greatest thing I've had in this life]. The thought of the other person leaving is truly painful, and the singer wonders how they'll live without them, remembering a time when things were sweeter. It's a beautiful, melancholic reflection on how pride can get in the way of love and the deep sorrow that follows when it's too late.