frustrated (over a failure, humiliation or injustice)

condolence

tears of regret

crying from vexation

chagrin

spite

spiteful person

to seem bitter (over)

mutual mourning (during which one does not make condolence calls or offer to help others also in mourning)

regret

regret

remorse

to feel sudden remorse

it is no use crying over spilt milk

sacrament of penance and reconciliation

contrition ②contrition (in Catholicism)

contrition

regret

to mourn ②to be sorry

to regret

to repent

no regrets

letter of condolence

repentance

my condolences

to regret