Deathshildy is an Old English and Middle English term for someone who has been condemned to death. It comes from the words death, meaning death, and shildy meaning guilty (coming from the Old English sċyldiġ).
Shildy referred to not only guilt, but also debt, indicating that the person had amassed a debt of sin that could only be paid for with their death. This could be used literally, meaning that one was condemned to death for their crimes, or figuratively, as a reference to human mortality, as we are all condemned to death in the end.
The more common forms in written Middle English are dēth-shildiȝ or deaþe scyldiȝ.