To quarrel is to fight — but usually not physically. Quarreling is a fact of life, occurring between the best of friends, in the happiest of marriages, and between parents and their children.
You’re probably familiar with the verb, quarrel, meaning having a disagreement. When there’s a quarrel, there’s anger. As a noun, quarrel, refers to the square-headed arrow shot from crossbow. This meaning of the word comes from the Old French quarel, relating to "square.” If you are quarreling, just don't reach for your crossbow and quarrel.