残業

1. Origins, structure, and basic meaning

• Structure: In 残業 (ざんぎょう), remaining 残 and work 業 combine to denote overtime.
• Basic usage: 残業 is work performed after regular working hours.

2. Common pitfalls and similar expressions

• Work beyond regular hours
  • 残業せずに connects a following action done without overtime, while 残業で can frame overtime as a reason or circumstance.