noun
staying at the same inn; rooming together
Refers to the act of sharing accommodation, typically at an inn or hotel. Often used in historical or travel contexts.
旅の途中で彼と相宿になった。
I ended up staying at the same inn as him during the trip.
相宿の客と夜遅くまで話し込んだ。
I talked late into the night with a fellow guest at the inn.