zhēn
real
Original meaning:
precious
Based on the original meaning "precious", now written as 珍. The meaning later shifted to "genuine" and "true".
Components
Evolution

Bronze script
Early Western Zhou (~1000 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
Sources
季旭昇《說文新證》p.643-644