限界

1. Origins, structure, and basic meaning

• Structure: 限界, read げんかい, is the furthest boundary of stamina, capacity, ability, or another measurable range.
• Basic usage: It can be a physical limit felt after a long walk or the maximum amount of water a container can hold.

2. Common pitfalls and similar expressions

• A boundary of stamina or capacity
  • It can be the felt endpoint of stamina after a long walk or the maximum capacity of a container. Context shows whether the boundary has been reached or is simply being described.