pǒu
to spit out
Original meaning:
not
Originally the same character as 否. A distinguishing mark was added later to the character to differentiate it from 咅. The current meaning "to spit out" is a phonetic loan.
Components
Evolution

Bronze script
Late Spring and Autumn (~500 BC)
Seal script
Shuowen (~100 AD)
Seal script
Shuowen (~100 AD)
Clerical script
Qin dynasty (221-206 BC)Regular script
ModernDefinitions