noun

1. a bolt or arrow with a quadrangular head, shot from a crossbow
2. a small, diamond-shaped or square pane of glass, as in a latticed window

Etymology: ME quarel < OFr < ML querellus < VL *quadrellum, dim. of L quadrus, a square

noun

1. a cause for dispute
2. a dispute or disagreement, esp. one marked by anger and deep resentment
3. a falling out; breaking up of friendly relations

Etymology: ME quarel < OFr querele < L querela, complaint < queri, to complain, lament < IE base *wes-, to pant, snort > wheeze

intransitive verb quarreled -·reled or quarrelled -·relled, quarreling -·rel·ing or quarrelling -·rel·ling

1. to find fault; complain
2. to dispute heatedly
3. to have a breach in friendship