This is the 1318th most frequent Korean word.
든
The Korean particle "든" means "whether," "either," or "whatever," expressing choices or indifference.
In this sentence, '든' is used to mean 'no matter who' when listing options in a general context.
남든 여든 모두 참석해야 합니다.
Men or women, everyone must attend.
Here, '든' expresses 'whether or not' to present alternative actions or states.
학교에 가든, 집에 있든, 공부는 해야 합니다.
Whether you go to school or stay at home, you must study.
In this example, '든' indicates 'or' to enumerate choices that are applicable in the situation.