fear
live to regret
shame
guilt
regrettingly
regretfully
bemoan
bewail
deplore
lament
regrettable
too bad
desire
regretlessness
ruesome
sayang
rue the day
pity
regret
repine
apologize
whip the cat
compunction
self-reproach
remorse
eat one's words
Ichabod
regrettableness
regretfulness
regretter
wear sackcloth and ashes
I'm afraid so
repent
lamentably
whoops-a-daisy
regretting
whoopsie-daisy
regretful
mean
no such luck
sorriness
if only
seem like a good idea at the time
F
apology
attrite
ochanee
put a foot wrong
sorry
not want to do that
afraid
goof up
boob
oops
drop a bollock
goof
boo-boo
reabsent
reforgive
fluff one's lines
boot one
err
lamenting
redecline
prick
afterthink
wanfortune
put behind one
could have, would have, should have
rereject
repathologize
go without
misremember
sorryish
four-flush
lay it on thick
forlet
disappointedly
apologetic
swindle
unhappily
misremembrance
repentance
bobble
fuckity bye
redeny
soz
skip a beat
regrettably
unhappen
reremember
forgettingly
alack and alas
remorselessness
bad show
forgiving
I'm afraid not