Remorse
'remorse' is the definition.
(remorse is a feeling of regret)
This is the entire clue.
(Other definitions for regret that I've seen before include "Rue, repine" , "Feeling or repentance or sorrow" , "Mourn" , "Rue - remorse" , "Compunction" .)
'remorse' is the definition.
(guilt is a kind of remorse)
This is the entire clue.
(Other definitions for guilt that I've seen before include "Sin" , "(Feeling induced by) wrongdoing" , "(Shame for) criminality" , "Remorse caused by feelings of responsibility" , "Bad conscience" .)
'remorse' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for repentance that I've seen before include "Regret, remorse" , "Contrition" , "Sincere remorse" , "Feeling of remorse" .)
'remorse' is the definition.
(synonyms)
This is all the clue.
(Other definitions for compunction that I've seen before include "Scruple" , "Twinge of guilt" .)
'remorse' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for penitence that I've seen before include "A show of regret for wrongdoing" , "display of remorse" , "Contrition, remorse" , "shame" , "Contriteness" .)