- 
                满心遗憾
                [măn xīn yí hàn]
                
                                        Heart full of regrets – this indicates someone who often feels remorseful or disappointed maybe ...
                
             
                        - 
                心头之憾
                [xīn tóu zhī hàn]
                
                                        Deep regret at heart refers to an intense lingering disappointment It suggests there are regrets ...
                
             
                        - 
                心有愧
                [xīn yŏu kuì]
                
                                        It implies a feeling of guilt or remorse hidden in ones heart usually due to past actions or unfulfilled ...
                
             
                        - 
                该说的没说出口
                [gāi shuō de méi shuō chū kŏu]
                
                                        This implies something left unsaid expressing regret or unspoken emotions possibly due to reluctance ...
                
             
                        - 
                深情总被辜负余生尽予暧昧
                [shēn qíng zŏng bèi gū fù yú shēng jĭn yŭ ài mèi]
                
                                        Deep Feelings Always Betrayed Leaving Life to Ambiguity : conveys regret and sorrow about deep ...
                
             
                        - 
                有辜负才有惦记
                [yŏu gū fù cái yŏu diàn jì]
                
                                        There can only be memories and regrets if there is any betrayal or letdown Some say it describes the ...
                
             
                        - 
                只怪承诺太动听
                [zhĭ guài chéng nuò tài dòng tīng]
                
                                        Indicates remorse caused by broken promises made in the past that felt so genuine and heartfelt at ...
                
             
                        - 
                遗憾告白
                [yí hàn gào bái]
                
                                        Confession with regret might express unreciprocated feelings or confessions made too late leaving ...
                
             
                        - 
                不表白怕给自己留遗憾
                [bù biăo bái pà jĭ zì jĭ liú yí hàn]
                
                                        Translates to Not Confessing Leaves Regret Within Oneself Here it suggests fear of having missed ...