One of the mysteries of the English language finally explained.
Quarrelsome, argumentative; litigious; fault-finding. Now chiefly US.
Late Middle English; earliest use found in ABC of Aristotle. From quarrel + -ous. In sense 1 perhaps after post-classical Latin querelosus (also querellosus) quarrelsome, complaining (Vulgate; 3rd cent.), painful, distressing, of or relating to a dispute.
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