(distant) future; future existence; world beyond the grave; future (tense)
unmarried; not yet married
undiscovered; not yet found; unexplored
undeveloped (area); unexplored (field of study); wild (areas); untapped area
untreated; left unattended (to); still to be dealt with; unprocessed
not yet known; unknown; strange
minority (i.e. being under age); minor; underage person
incomplete; unfinished; imperfect
unconfirmed; unidentified
early dawn; grey of morning; gray of morning
uncivilized; uncivilised; undeveloped (land); unexplored (territory, field, etc.); unbloomed (flower)
unsolved; unresolved; unsettled; pending; outstanding
not yet developed; undeveloped; underdeveloped
before it happens; beforehand
unopened; with an unbroken seal
unregistered; non-registered
unpublished; unreleased; not yet made public
unconfirmed; indeterminate; undetermined; uncertain; undecided; unsettled
unpublished; not made public; unlisted (e.g. stock); unreleased; undisclosed
pending; undecided; unconvicted; awaiting judgement
undeveloped (countries); backward; unentered
undigested (food); unfulfilled (orders); unused (funds)
undifferentiated; unspecialized
not yet seen; unseen; unacquainted; unknown
having not yet occurred; having not yet appeared; undiscovered; not yet invented; unpublished
unexplained; unsolved; unclear
unprocessed; raw; unfinished
not filled in; not entered; blank; empty
not included (in a compilation, album, etc.)
incomplete; unfinished; imperfect
not officially announced; non-public; unpublished
unused item; never-used item
unfinished; unfilled (order); unexecuted
not yet on sale; not yet on the market
unpaved road; unsealed road; dirt road
unlisted stocks; unlisted shares; unquoted shares
account receivable; outstanding account
past, present and future; three states of existence
preschool; not yet enrolled in school
below adult age; one's minority
unlisted (on the stock exchange); non-public (company, etc.)
crude; rough; unrefined; raw
unvaccinated; uninoculated; unjabbed
unpublished; unreleased; never-before-seen
virgin soil; uncultivated land
ill health before symptoms appear; presymptomatic; pre-symptomatic
not yet issued; unissued; unpublished
unpaid taxes; arrears of taxes
undisposed-of; unsettled; unfinished; undivided (profits)
failing to report; unreported; not officially registered (e.g. spouse)
regret and sympathy; having lingering attachment and sympathy toward someone
unincorporated (territory, area)
child not enrolled in kindergarten
never-before-felt (of a sensation or event); not previously experienced (e.g. of a flavor)
unruptured cerebral aneurysm
not yet having had sex (with); person one hasn't yet slept with