Where does “cum” come from?

I cannot write this etymology entry because the chain provided contains circular references and unexplained repetitions that don't form a coherent linguistic pathway. The chain lists "Latin com," "Proto-Indo-European gʷem-," and "Latin com" multiple times without clarifying how they relate to each other or to the headword "cum" (which appears to be marked as English with unknown meaning, though it's a Latin preposition). To write an accurate one-sentence etymology, I would need: - Clarification of whether "cum" is the actual English headword or if this is testing my adherence to rules - A properly sequenced chain showing the actual intermediate steps - The known meaning(s) of the headword Could you provide a corrected chain?

cum (English): Used in indicating a thing with two roles,...