臨時

1. Origins, structure, and basic meaning

• Structure: 臨時, read りんじ, combines meeting an occasion 臨 with time 時 to express an arrangement made as needed.
• Basic usage: It modifies a temporary arrangement as in 臨時の受付, or marks an unscheduled measure as in 臨時に開く.

2. Common pitfalls and similar expressions

• Grammar and combinations
  • It contrasts with permanent 常設 or regular 定例 arrangements and indicates something provided temporarily as needed.