客室

1. Origins, structure, and basic meaning

• Structure: In 客室 (きゃくしつ), guest 客 and room 室 combine to denote a guest room.
• Basic usage: 客室 is a room for guests or passengers in a hotel, vessel, or home.

2. Common pitfalls and similar expressions

• Guest room as origin and destination
  • 客室から marks it as a point of origin, while 客室に marks destination or presence; it differs from staff-only space.