"Lay door" is not a word or idiom in the English language, therefore, it does not have any antonyms. However, the word "door" has several antonyms depending on the context in which it is used. For instance, if "door" is used in the sense of an opening in a wall or a partition for people to pass through, then possible antonyms may include barriers, walls, fences, or partitions that prevent or limit access. Alternatively, if "door" is used in the sense of an opportunity or gateway to something, then antonyms may include hindrances or blockades that prevent or restrict access to such opportunities.