jī
accumulate, store up
Phonosemantic compound. 禾 represents the meaning and 只 represents the sound. Simplified form of 積.
Evolution

Bronze script
Late Shang dynasty (~1100 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Traditional script
ModernSimplified script
ModernDefinitions
Sources