zì
self
Original meaning:
nose
Pictograph of a nose. Original form of 鼻 (nose). In China, when people point to themselves, they typically point to their nose.
Evolution

Oracle script
(~1250-1000 BC)
Bronze script
Early Western Zhou (~1000 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Qin dynasty (221-206 BC)Regular script
ModernDefinitions
Component uses
Sources
季旭昇《說文新證》p.272