The kanji 悔悔 fundamentally expresses the feeling of regret, remorse, or repentance. It encapsulates the emotional experience of feeling sorry for a past action or inaction, often accompanied by a desire to have done things differently. It implies an awareness of having made a mistake and a wish to undo or change the situation.

・On-yomi (音読み): カイ ・Kun-yomi (訓読み): く悔や.む (kuyamu - to regret, to be sorry)

⚫︎後悔 (こうかい) Translation: Regret ⚫︎反省と悔悟 (はんせいとかいご) Translation: Reflection and repentance ⚫︎悔しい (く悔しい) Translation: Regretful; frustrating; vexing (used to describe a feeling of frustration or disappointment)

The kanji 悔悔 is a phono-semantic compound (形声文字). It is composed of two parts: the left side is the "忄" radical (りっしんべん - *ritsushinben*) which represents the "heart" or "mind," and the right side is 每 (mai), which functions as the phonetic component, suggesting the sound of "kai." The combination of the "heart" radical with the phonetic component indicates that the character relates to something experienced internally. The character’s formation reflects that regret comes from something that you feel with your heart or mind.