guǐ
track
Phonosemantic compound. 车 represents the meaning and 九 represents the sound. Simplified form of 軌.
Evolution

Bronze script
Mid Western Zhou (~900 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Traditional script
ModernSimplified script
ModernComponent uses
Sound component in 1 character (0 verified)