rue the day
live to regret
wear sackcloth and ashes
fear
regretting
guilt
apologize
sorry
remorse
compunction
self-reproach
regrettableness
regrettable
eat one's words
bewail
deplore
lament
bemoan
repine
whip the cat
regretful
too bad
not want to do that
regrettingly
regretfully
regretter
ruesome
regret
repent
shame
apology
pang of conscience
look back
sorriness
attrite
sayang
regretfulness
regretlessness
F
penitence
penance
contrite
repentance
desire
could have, would have, should have
I'm afraid so
put behind one
lamentably
obliviousness
afterthink
oblivion
redemption fatigue
pity
penitent
repentant
palliate
reforgive
forlet
repathologize
Canossa
face the music
memory-hole
carry the can
flip the script
explain
Ichabod
seem like a good idea at the time
regrettably
forgiving
fault
rue
no such luck
guilt trip
resipiscence
sackcloth and ashes
fashy
guilty conscience
guilt feelings
apologetic
stupor
shock
get over
daze
beat up
kick
eat humble pie
recallment
remorsefulness
mix-up
agenbite
what has someone done
confusion
whipping boy
condone