Fetching details from the dictionary...
lodging together; training camp; boarding house
部活の合宿で仲が深まった。
Our bonds deepened during the club training camp.
夏休みの合宿は川沿いの宿泊施設で行われた。
The summer training camp was held at a lodge along the river.
合宿の最終日に全員で写真を撮った。
On the last day of the camp, everyone took a photo together.