guilt
live to regret
compunction
remorse
self-reproach
fear
wear sackcloth and ashes
apologize
regrettingly
too bad
regrettable
regretfully
shame
whip the cat
pity
apology
regretlessness
eat one's words
ruesome
rue the day
repine
regret
whoopsie-daisy
whoops-a-daisy
deplore
bemoan
regretful
bewail
lament
Ichabod
repentance
regretting
sorriness
F
regretfulness
sayang
could have, would have, should have
no such luck
ochanee
repent
afraid
regretter
desire
correction
oops
satisfaction
chastening
chastisement
if only
regrettableness
seem like a good idea at the time
reverse
sorry
alack and alas
misbecame
misgave
prick
pang of conscience
I'm afraid so
soz
wrongdid
bobble
misbode
repentant
misgrew
boo-boo
drop a bollock
goof
penance
fluff one's lines
goof up
boob
err
put a foot wrong
attrite
penitence
look back
re-experiencing
boot one
wrongdoing
reliving
misbefell
wrongtook
guilty conscience
outgave
see
wanweird
misfell
guilt-ridden
put behind one
attrition
mess-up
sorry for oneself
misremembering
lamentably