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