後悔【こうかい】
regret, repentance, remorse
悔しい【くやしい】
frustrated (over a failure, humiliation or injustice), annoyed, chagrined, (bitterly) disappointed, bitter, vexed, frustrating, annoying, regrettable
悔い【くい】
regret, repentance
お悔やみ【おくやみ】
condolences
悔やむ【くやむ】
to mourn, to lament, to be sorry, to regret, to repent
悔し泣き【くやしなき】
crying from vexation, tears of regret
悔いる【くいる】
to regret
悔し涙【くやしなみだ】
tears of regret, bitter tears, vexation, chagrin
悔やみ【くやみ】
condolence, condolences
懺悔【さんげ】
repentance, confession, penitence