Where does “quarrelsome” come from?

I need to work through this chain carefully, but I notice there are significant issues with it. The chain provided appears to be garbled or incorrectly constructed: - It jumps between unrelated words (quarrel, some, caput) - It lists "Proto-Indo-European sem-" twice - The connection between these elements to explain "quarrelsome" is incoherent - The "known meaning: (unknown)" suggests the semantic development cannot be established Following your rules strictly—I must "state only what the chain supports" and "do not invent dates, cognates, or intermediate steps"—I cannot write an accurate one-sentence etymology because this chain does not coherently support the origin of "quarrelsome." To do this correctly, I would need a chain that actually traces quarrelsome through its real etymology (quarrel from Old French querele from Latin querella meaning "complaint," plus the English suffix

quarrelsome (English): Argumentative; fond of or prone to quarreling