kǔ
bitter
Phonosemantic compound. 艹 represents the meaning and 古 represents the sound.
Evolution

Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
Component uses
Meaning component in 1 character (0 verified)
Sound component in 1 character (0 verified)
Sources