Cada día alguien me habla de ti intentando sacar el dolor de mi alma Cada día alguien me habla de ti intentando explicarme que ya no volverás
Every day someone speaks of you to me, trying to quell the pain in my soul Every day someone speaks of you to me, trying to explain to me that you aren't coming back
Although an indefinite determiner (which means by definition that it modifies a noun),cada does not undergo any kind of inflection. In other words, its ending will not change to-o when modifying a masculine noun. It remainscada.