相乗り

1. Origins, structure, and basic meaning

• Structure: 相乗り is read as あいのり and means “ride-sharing” and “sharing a ride”.
• Basic usage: It describes four people sharing a car and reducing taxi fare through a shared ride.

2. Common pitfalls and similar expressions

• 四人で相乗りする / 相乗りで料金を抑える
  • Use 四人で相乗りする for the participants and 相乗りで料金を抑える for ride-sharing as the means of saving money.