Where does “preheat” come from?

I need to carefully work through this chain, but I notice there's a significant problem: the chain provided doesn't actually trace "preheat" coherently. The chain given jumps between unrelated elements: - "heat" → "heten" → "prae-" (Latin prefix) → "prae" → various PIE roots This chain conflates the etymology of "heat" with the prefix "pre-" (from Latin "prae"), but doesn't show how "preheat" as a compound word was formed or what "the known meaning: (unknown)" refers to. A proper chain for "preheat" should show: - English "preheat" (prefix "pre-" + verb "heat") - Which derives from "pre-" (from Middle English "pre-" and Latin "prae-") - Plus "heat" (from the chain: Middle English "h

preheat (English): to heat something in preparation for further...