Character 鑑

It turns a mirror into a model, warning, or judgment.

The character's old form shows a person looking into a large basin, used for washing and reflection. Inscribed bronze basins called jian are documented from the Spring and Autumn period. The mirror image widened into a metaphor: the past can be a guide or a warning, and 鑑 can also name an appraisal.

In Chinese compounds, 鑑 can mean a mirror, warning, precedent, or appraisal. Japanese also reads it as かがみ (“mirror”) and uses 鑑みる for considering a matter in light of experience or circumstances.

What does 鑑 mean in a message?

The surrounding phrase fixes the sense; 鑑 alone is ambiguous.

In Chinese, 前車之鑑 says a past failure can serve as a warning, while 鑑定 means assessing an object's identity, quality, or value. In Japanese, 鑑みて means judging in light of circumstances or earlier events. At a formal Chinese letter closing, 鈞鑒 politely asks the recipient to read.

How is 鑑 different from 鑒 and 鉴?

鑒 is an alternate traditional form; 鉴 is its simplified Chinese counterpart.

The forms share the same word history, but a text follows its script's spelling. 鏡 is a separate character for “mirror”; 鑑 extends that mirror sense to a guide, warning, precedent, or appraisal.