expression, ichidan verb
stay for many nights; stay long
Used when someone stays overnight repeatedly or for an extended period, often at an inn or someone's home. The expression emphasizes the accumulation of nights.
旅先で泊を重ねると、だんだんその土地に詳しくなる。
When you stay many nights while traveling, you gradually become familiar with the area.
彼
He stayed night after night at his friend's house and ended up staying for a whole week.