• 精神せいしん — spirit / mind
• 精米せいまい — polished rice
• 精度せいど — precision / accuracy
• 精力せいりょく — vitality / energy
• 精進しょうじん — devotion / diligence
• 精密せいみつ — detailed / exact
• 精選せいせん — carefully selected

The radical 米 (rice) represents food and refinement, while 青 (pure, clear) provides the sound. Together, 精 carries the sense of “purified rice,” extending to meanings of essence, spirit, and refinement. It is used for precision, vitality, and mental clarity.

彼かれは 精神的せいしんてきに 強つよい。
He is mentally strong.

この機械きかいは 精度せいどが 高たかいです。
This machine is highly precise.