gǔ
old
Original meaning:
firm, solid
Depicts a shield. Based on the original meaning "firm, solid", which is now written as 固. The current meaning "old" is a phonetic loan.
Components
Evolution

Oracle script
(~1250-1000 BC)
Bronze script
Early Western Zhou (~1000 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernComponent uses
Meaning component in 1 character (0 verified)
Sources
季旭昇《說文新證》p.154