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