the future (usually distant); future tense; the world to come
not yet known; unknown; strange
unripe; green; inexperienced; immature; unskilled
lingering attachment; lingering affection; regret; reluctance; ruefulness
unheard-of; unprecedented; unparalleled in history (unparallelled); record-breaking
failed attempt (at a crime, suicide, etc.)
incompletion; incomplete; unfinished
unmarried; not yet married
(an) unknown; unknown number; variable; unknown quantity; not yet known
unconfirmed; unidentified
early dawn; grey of morning; gray of morning
forevermore; for eternity
to prevent; to take precautions
not knowing when to let go (give up, etc.); unwilling to resign; having lingering attachment; regretful
uncivilized; uncivilised; undeveloped (land); unexplored (territory, field, etc.); unbloomed (flower)
man of the future; Homo futurus
unprecedented; unheard-of; record-breaking
not yet fixed; undecided; pending
unsettled; pending; unresolved
savage (barbaric) land; backward region; undeveloped area
before it happens; previously
under ... years of age; less than ... years old
uncharted territory; unknown waters; unfamiliar terrain
undiscovered; not found; unexplored
undeveloped (area); unexplored (field of study); wild (areas); untapped area
unopened (state); with an unbroken seal
unregistered; non-registered
mysterious and unconfirmed animals (e.g. chupacabra, etc.)
untrodden (region, field of study, etc.); unprecedented (discovery, achievement, etc.)
unreached; unattained; unachieved; unprecedented
payment default; overdue on a payment
unpublished; not yet announced
not knowing when to let go (give up, etc.); unwilling to resign; having lingering attachment; regretful
unidentified flying object; UFO
couple who are more than friends, but not in an intimate relationship
unpublished; not made public; unlisted (e.g. stock); unreleased; undisclosed
pending; undecided; unconvicted; awaiting judgement
undeveloped (countries); backward; unentered
barbarian; savage; savage (primitive) people (race)
undifferentiated; unspecialized
more than friends, less than lovers
undigested (food); unfulfilled (orders); unused (funds)
non-achievement (of a goal); failing to achieve
untreated; left unattended (to); still to be dealt with; unprocessed
uncompleted; unfinished; crude
not yet seen; unseen; unacquainted; unknown
unexplained; unsolved; unclear
before an event takes place
unconvicted prisoner; prisoner under trial
child abduction; kidnapping of a minor
unprocessed; raw; unfinished
conscious neglect; willful negligence; wilful negligence
not yet officially announced
unfinished; unfilled (order); unexecuted
incomplete; unfinished; imperfect
pre-school child; pre-schooler
unused item; never-used item
not included (in a compilation, album, etc.)
unlisted stocks; unlisted shares; unquoted shares
ignoring a text message by leaving it unopened and marked as "unread" (in online chatting)
before one's birth; before one was born
nai stem (of a Japanese verb); irrealis form; imperfective form
account receivable; outstanding account
to the end of time; to the crack of doom; for ever and ever
preschool (not yet entered school)
past, present and future; three states of existence
below adult age; one's minority
crude; rough; unrefined; raw
ill health before symptoms appear; presymptomatic; pre-symptomatic
unvaccinated; uninoculated
attempted extortion; extortion attempt
unprecedented; unheard-of; never propounded (discovered, invented) by anyone before
anonymous; of unknown authorship
person in arrears; (tax) defaulter
undefined behavior; unspecified behavior
unknown language; unknown word
virgin soil; uncultivated land
primitive and barbarous; uncivilized and barbaric
unsettled; unfinished; undivided (profits)
Law for Prohibiting Minors from Smoking
tendency to not get married; declining marriage rate
failing to report; unreported; not officially registered (e.g. spouse)
unregistered owner identifier
Kinmirai Seiji Kenkyūkai (faction of the LDP)
dialogue establishment indication outstanding
dialogue establishment request outstanding
goods in transit; stock yet to arrive
uncompleted (railway) line
prepaid insurance premium; unearned premium; unexpired premium
handshake indication outstanding
handshake request outstanding
outstanding account; unpaid account
regret and sympathy; having lingering attachment and sympathy toward someone
retinopathy of prematurity
unsympathetic and inconsiderate; coldhearted