下限

1. Origins, structure, and basic meaning

• Structure: 下限, read かげん, is the lowest boundary or minimum value in an allowed or measured range.
• Basic usage: It can set the minimum application age or serve as the water-level threshold below which an alarm sounds.

2. Common pitfalls and similar expressions

• The lowest allowed value
  • It denotes the lower boundary of a range, such as a minimum application age or water-level threshold. Falling below that boundary is expressed separately.