apple of discord
01
a thing that is the source of a trouble, particularly by making people argue over it
Idiom
Informal
예시들
That stupid prom dress has been their apple of discord — they've been fighting over who gets to wear it for days now!
This problem seems to be an apple of discord between the Soviet union and the USA.
02
(classical mythology) a golden apple that ignited a divine rivalry, leading to events that caused the Trojan War
