room and board
词源说明
The board in such constructions (e.g., room and board, bed and board) is a reference to the table at which meals are eaten, thus metonymically representing food as part of the compensation or service. This makes food and board redundant and probably a mere catachresis, albeit a well-attested one.
释义（英文）
名词 Noun
- A place of lodging with daily meals (board), usually provided in return for rent or other considerations.