余裕

1. Origins, structure, and basic meaning

• Structure: 余裕(よゆう) is a noun for time, space, capacity, or mental room beyond what is needed.
• Basic usage: It describes having capacity to do something or remaining composed.
  • 電車を待つ余裕 refers to having time to wait for the train.
  • 心に余裕を持って describes acting with mental composure.

2. Common pitfalls and similar expressions

• Free time and room to spare
  • 暇(ひま) mainly refers to free time or a break from things to do.
  • 余裕 can describe time or mental capacity available even while someone is busy.