The story
- Latin · derived fromquartus
- English todayquartation
Latin quartus, "fourth", because usually enough silver is added to make the amount of gold in the alloyed button about one fourth.
Words from the same roots
Latinquartus all →
quartquartocotocuartoquartacuartillacuartilloquadroonquartanequartaryquartinequasquicentennial
Etymology from Wiktionary, CC BY-SA 4.0.