to fall behind; to lag (in technology etc); backward; to retrogress
落 (là) · 12 strokes
Phonosemantic compound. 艹 represents the meaning and 洛 represents the sound.
后 (Hòu) · 6 strokes
Depicts a queen mother (母) giving birth to her heir (𠫓). Based on the original meaning "heir to the throne". The meaning later expanded to "ruler", "successor", and "after".