The Italian term "pentirsi, compianto, lamentare" matches the English term "regret"

other italian words that include "pentirsi" : english :
pentirsi rue
other italian words that include "compianto" : english :
peccato, compassione, compianto pity
compianto regretfulness
other italian words that include "lamentare" : english :
lamentare, appesantire complain
lamentare deplore