• 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.