chā
to separate the grain from the husk
Depicts using a pestle (午) to grind grain to be separated from its husk in a mortar (臼). Original form of 插.
Evolution

Bronze script
Late Western Zhou (~800 BC)
Seal script
Shuowen (~100 AD)Regular script
ModernDefinitions
Component uses
Meaning component in 1 character (1 verified)
Sources