Where does “instead” come from?

I need to work with the chain provided, but I notice there's a significant problem: the chain given doesn't actually support the word "instead" at all. The chain traces "in" → "inch" → "inn" → "uncia" → PIE roots, which has nothing to do with "instead." "Instead" comes from Middle English "instead," from "in stead" (in place of), where "stead" means place/position. This chain doesn't reflect that etymology. Given the instruction to "state only what the chain supports" and "do not invent," I cannot write an accurate summary sentence because the provided chain does not support the headword "instead." Could you verify either: 1. The headword (should it be "inch" or "inn"?) 2. The etymological chain (is this the correct chain for "instead"?) I want to provide an accurate sentence that follows your rules

instead (English): In the place of something (usually mentioned earlier); as a substitute or alternative