quarrel (n.1)

"angry dispute," mid-14c., originally "ground for complaint," from Old French querele "matter, concern, business; dispute, controversy" (Modern French querelle), from Latin querella "complaint, accusation; lamentation," from queri "to complain, lament." Replaced Old English sacan. Sense of "contention between persons" is from 1570s.

quarrel (n.2)

"square-headed bolt for a crossbow," mid-13c., from Old French quarel, carrel "bolt, arrow," from Vulgar Latin *quadrellus, diminutive of Late Latin quadrus (adj.) "square," related to quattuor "four" (from PIE root *kwetwer- "four"). Now-archaic sense of "square or diamond-shaped plane of glass" first recorded mid-15c.

quarrel (v.)

late 14c., "to raise an objection;" 1520s as "to contend violently, to fall out," from quarrel (n.1) and in part from Old French quereler (Modern French quereller). Related: Quarrelled; quarrelling.

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Definitions of quarrel from WordNet
quarrel (n.)
an angry dispute;
they had a quarrel
Synonyms: wrangle / row / words / run-in / dustup
quarrel (n.)
an arrow that is shot from a crossbow; has a head with four edges;
quarrel (v.)
have a disagreement over something;
We quarreled over the question as to who discovered America
Synonyms: dispute / scrap / argufy / altercate