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