regretlessness
live to regret
no such luck
regrettingly
regrettable
too bad
sayang
guilt
fear
ruesome
remorse
self-reproach
compunction
shame
bewail
bemoan
desire
lament
deplore
whip the cat
regretfully
could have, would have, should have
grudgelessness
seem like a good idea at the time
regretfulness
pity
regretful
regretting
remorselessness
unremembrance
regret
regrettableness
repine
afraid
regretter
eat one's words
nostophobia
nonrenunciation
apologize
amnesia
unremembering
apology
amnesty
if only
disremember
unforget
misremembering
reabsent
nonguilt
lamentably