Like a doornail, it’s said

The phrase “Like a doornail, it’s said is DEAD” refers to the saying “dead as a doornail“. This means that something is completely lifeless and beyond any hope of restoration or reanimation. The origins of the phrase are unclear, but it is thought to have come from the practice of nailing doornails in such a way that they could not be used again, thereby rendering them useless and “dead“. In modern usage, the phrase is often used to describe someone or something that is definitively or irretrievably dead or done for.