Arrepiento comes from the verb arrepentirse, meaning "to regret" or "to repent". It's a strong emotional word that conveys deep remorse.
In "El Abrazo De Mamá", the singer expresses profound regret for not having cherished and embraced his mother more while she was alive. He sings, "Y hoy vuelvo a sentir que me arrepiento de no amarte y abrazarte una vez más" (And today I feel again that I regret not loving and embracing you one more time), highlighting the poignant theme of missed opportunities and the enduring pain of loss.
Rodrigo Tapari's "El Abrazo De Mamá" is a really heartfelt song where he looks up at the sky and asks for forgiveness. He admits that his mistakes in life have hurt his mother's heart, singing, "Miro al cielo y entiendo que hoy Debo pedirte perdón Y así curar heridas Que con errores en la vida Lastimaron tu corazón" [I look at the sky and understand that today I must ask for your forgiveness And thus heal wounds That with errors in life Hurt your heart].
He's clearly filled with regret, wishing he could go back and hug his mom just one more time. The pain of her absence is really strong for him, as he mentions, "No puedo con este dolor Me quema por dentro tu adiós" [I can't with this pain Your goodbye burns inside me]. He just wants to see her smile and make her happy with "Un abrazo mamá" [A hug, mom].