jīng
essence
Phonosemantic compound. 米 represents the meaning and 青 represents the sound.
Evolution

Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
jīng
essence; semen; spirit; extract; vitality; energy; sperm; mythical goblin spirit; highly perfected; elite; the pick of sth; proficient (refined ability); extremely (fine); selected rice (archaic)
Sources