可変

1. Origins, structure, and basic meaning

• Structure: 可変, read かへん, denotes the property of a setting such as height or direction being adjustable.
• Basic usage: It describes a desk whose height can change and a light whose direction can be adjusted.

2. Common pitfalls and similar expressions

• Adjustability rather than a fixed setting
  • It means a setting such as height or direction can be adjusted as needed, not that it fluctuates unpredictably.