(kwôr′əl, kwor′-) noun
1. An unfriendly, angry, or violent dispute.
2. A falling out or contention; breach of amity: a lover's quarrel.
3. The cause for dispute.
—v.i. ·reled or ·relled, ·rel·ing or ·rel·ling
1. To engage in a quarrel; dispute; contend; fight: to quarrel about money.
2. To break off a mutual friendship; fall out; disagree.
3. To find fault; cavil. [<F querelle <L querela complaint]
—quar′rel·er or quar′rel·ler noun Synonyms (noun): affray, altercation, bickering, brawl, breach, broil, contention, contest, controversy, disagreement, discussion, dispute, dissension, feud, fracas, fray, fuss, jangle, jar, misunderstanding, quarreling, rupture, scene, squabble, strife, wrangle. A quarrel is in word or act, or both, and is often slight and transient, as we speak of childish quarrels; but quarrel may denote the cause or ground of contention or strife, and so be deep and enduring. Contention and strife may be in word or deed; contest ordinarily involves some form of action. Controversy is commonly in words; strife extends from verbal controversy to the contests of armies. See ALTERCATION, FEUD¹. Antonyms: accord, amity, acquiescence, concord, harmony, peace, reconciliation.

(kwôr′əl, kwor′-) noun
1. A dart or arrow with a four–edged head, formerly used with a crossbow.
2. A graver, stonemason's chisel, glazier's diamond, or other tool having a several–edged point. [<OF <LL quadrellus, dim. of L quadrum a square <quattuor four]