to mourn; to lament; to be sorry; to regret; to repent
to repent; to be penitent
no regrets; without regrets
my condolences; my deepest sympathy
letter of condolence; condolence message
tears of regret; bitter tears; vexation; chagrin
mutual mourning (during which one does not make condolence calls or offer to help others also in mourning)