self-reproach
remorse
compunction
fear
wear sackcloth and ashes
bemoan
regrettingly
bewail
deplore
lament
rue the day
whip the cat
regrettableness
live to regret
shame
eat one's words
regretter
repine
ruesome
sayang
too bad
regrettable
guilt
regretfully
regret
desire
apology
regretfulness
regretlessness
regretful
repent
lamentably
afterthink
regrettably
ochanee
regretting
repentant
penitent
could have, would have, should have
sorriness
Ichabod
repentance
apologize
sorry
pity
penitence
penance
look back
F
bottle
remorsefulness
contrite
pang of conscience
attrite
Schadenfreude
miss
kick
prick
not want to do that
afraid
alack and alas
aiyo
whoops-a-daisy
whoopsie-daisy
amnesty
no such luck
sorry for oneself
remorselessness
overgave
sackcloth and ashes
forgave and forgot
forgave
remorsefully
heap coals of fire on someone's head
seem like a good idea at the time
lamentless
unremorseful
remorseful
unrepentant
mean
impenitent
adios
arrivederci
au revoir
adieu
cheerio
auf wiedersehen
bye
bye-bye
good-by