to regret; to feel remorse
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".
悔 (huǐ) · 10 strokes
Phonosemantic compound. 忄 represents the meaning and 每 represents the sound.