French way to show regret (3)
I believe the answer is:
rue
I believe this is a double definition.
'french way' is the first definition.
('road' or 'street' in French)
'show regret' is the second definition.
(I've seen this before)
'to' is the link.
(Other definitions for rue that I've seen before include "way Parisians go about" , "Regret - wild shrub" , "Cry" , "Bemoan" , "Regret; road (Fr.)" .)