사이에

In a sentence

• 책상과 의자 사이에 가방이 있어요.

  There is a bag between the desk and the chair.

  Here, '사이에' (between) specifies the location or spacetime context connecting two entities (desk and chair).

• 두 나라 사이에는 대화가 필요해요.

  Dialogue is needed between the two countries.

  In this sentence, '사이에' indicates the relationship or interaction context connecting two countries.

• 사이에 있는 이웃은 그리 친하지 않아요.

  The neighbor that is in between is not very close.

  Here, '사이에' is used to express an intermediate position and a social relationship between entities.