unhappening
non-occurring
Chinese puzzle
under no circumstance
luckless
unmanifested
never
doodly
all at once
postcessation
unvenial
casual
nonincident
hopelessly
nonoccurrence
unoccasioned
unarisen
nonexistent
folly
chance
barring
come what may
blanked
unmanifest
if not for
nonmanifest
remain to be seen
unluckily
yesterday's news
in any case
might-have-been
chancelessness
spontaneous
nonresultant
as if nothing had happened
unendeared
accidental
postfact
unencountered
inadvertent
suddenly
existless
lacking
missing
wanting
nonexisting
unfetched
by accident
on a losing wicket
pseudoabsence