also: しゅっこん
old grudge; long-standing resentment
Refers to a grudge or resentment that has been held for a long time, often from past events. Somewhat literary or formal in tone.
He plotted revenge to settle an old grudge.
There is a long-standing resentment between the two families.
Alternate reading; less common but still encountered.
Compound of 宿 (しゅく, 'old, long-standing') and 恨 (こん, 'grudge, resentment'). The reading しゅっこん is a euphonic change.