biān
whip
Phonosemantic compound. 革 represents the meaning and 便 represents the sound.
Evolution

Bronze script
Mid Western Zhou (~900 BC)
Seal script
Shuowen (~100 AD)Regular script
ModernDefinitions
biān
whip; string of firecrackers; whip or lash; to flog; to whip; conductor's baton; segmented iron weapon (old); penis (of animal, served as food)
Sources