悔恨
Noun
Irregular
Noun
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb surunouns which may take the genitive case particle 'no'
regret;remorse;repentance;contrition
私が悔恨の情をもって回顧することが一つある。
There is one thing I look back on with regret.