bì, bēn
forge ahead
Original meaning:
adornment
Phonosemantic compound. 貝 represents the meaning and 卉 represents the sound. Based on the original meaning "adornment". The current meaning is a phonetic loan.
Evolution

Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernSources