the.com/quarrel
A disagreement that grew teeth and decided to stay for dinner.
means An angry argument or dispute, usually between people who otherwise care enough to fight.
from From Latin querella, a complaint or grievance, via Old French querele — the formal cousin of whining.
Crossbow twinA quarrel is also a square-headed arrow bolt.
Window paneDiamond glass panes were called quarrels too.
Root grudgeShares ancestry with querulous, meaning habitually complaining.