又貸し

1. Origins, structure, and basic meaning

• Structure: 又貸し(またがし) means lending something one has borrowed to a further person. 貸し is read がし in this compound.
• Basic usage: It covers subletting a rented room, but also lending a borrowed book to someone else.

2. Common pitfalls and similar expressions

• Different from an initial loan
  • 貸す(かす) generally means lending. With 又貸し, the crucial relationship is that the lender has already borrowed the item from someone else.
• Lack of permission is expressed separately
  • In 無断で又貸しして, 無断で specifies that it was done without permission. The first example presents a prohibition under that room's contract.