This is the 8963rd most frequent Korean word.
개국의
"개국의" means "national" or "of a nation."
The word '개국의' here refers to 'of founding', related to the history or establishment of the country.
이 나라는 개국의 역사가 오래되었습니다.
This country has a long history of founding.
The word '개국의' is associated with 'of founding,' indicating the ideology or principles associated with a nation's establishment.
우리는 개국의 정신을 잊지 말아야 합니다.
We must not forget the spirit of founding the country.
Here, '개국의' pertains to 'of founding,' describing the pioneers who contributed to the establishment of the nation.