negative, non-, bad, ugly, clumsy
不 centers on negation and reversal: it marks something as not, non-, or the opposite of good, leading to senses like bad, ugly, or clumsy.
不 is an ancient pictograph of a bird flying upward, later borrowed to express negation. The modern form is highly abstract and no longer resembles the original image.
The four simple strokes of 不 look like a barrier or a crossed-out sign, blocking or negating what comes before it. Think of it as a universal 'not' symbol.
For フ, imagine a big red 'F' stamp on a test paper, marking it as a failure: F -> フ, and the stamp says 'not good enough'.
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unclear; obscure; indistinct; uncertain; ambiguous
un-; non-
anxiety; uneasiness; worry; apprehension; fear; insecurity; suspense
wonderful; marvelous; strange; incredible; amazing; curious; miraculous; mysterious
insufficiency; deficiency; shortage; lack; scarcity; deficit
impossible
dissatisfaction; discontent; displeasure; complaint; unhappiness
unnecessary; unneeded
injustice; unfairness; wrongdoing; iniquity; impropriety; irregularity; dishonesty; illegality; fraud
bad; poor; inferior; defective
bad(-tasting); unpalatable; unsavoury; unsavory; awful; terrible; unpleasant
unhappiness; sorrow; misfortune; disaster; accident
real estate
adultery; impropriety; (an) affair; immorality
impossible; incapable (of doing); unable (to do)
displeasure; discomfort; unpleasantness
wrong; bad; improper; unjustifiable; inadvisable
instability; insecurity; crankiness
disadvantage; handicap; unfavorable position
absence
unlawful; illegal
inconvenience; inexpediency; unhandiness
doubt; suspicion; question; strangeness
insufficient; inadequate; imperfect
weird; eerie; ominous; creepy; uncanny; unearthly
unfair; unjust; wrongful; improper; unreasonable; unwarranted; unjustified; undeserved; undue
discomfort; inconvenience
unpleasant; disagreeable; displeasing; uncomfortable; unhappy
indispensable; essential
bad condition; poor condition; disorder; slump; being out of form
unsuitable; inappropriate; improper
unreasonable; irrational; outrageous; absurd
partial; incomplete; imperfect
unnatural; artificial; affected; strained
distrust; mistrust; disbelief; discredit
(economic) depression; recession; slump
scandal; impropriety; misconduct
immovable; motionless; firm; unwavering; unshakable; steadfast
clumsy; awkward; unskillful
imperfect; incomplete; faulty; defective
unfairness; injustice; partiality
inevitable; inescapable; unavoidable
defect; deficiency; imperfection; inadequacy; lack
incomprehensible; mysterious; inexplicable; inscrutable; enigmatic; baffling
irregular; unsystematic; unsteady; disorderly
disadvantage; handicap; drawback; inadvisability; inexpediency; loss
suspension; interruption; stoppage; tie-up; cessation
inconvenient; inexpedient; unfavourable; troublesome; difficult
disquieting; threatening; turbulent; restless; unsettled; disturbing
misfortune; bad luck; ill luck; ill fortune
sudden; abrupt; unexpected; unforeseen
opaque; obscure; murky; turbid
dullness; slump; stagnation; inactivity; depression
infertility; sterility; barrenness
lack of sleep; insufficient sleep
misfire
not asking (about); letting go unquestioned; disregarding; ignoring; overlooking
bad reputation; poor reception; unpopularity; disrepute
barren; sterile; infertile
eternal; everlasting; unchangeable; immutable; immovable; constant; permanent; indestructible
dissatisfaction; discontent; disapproval; objection; complaint; protest; disagreement
absurd; irrational; unreasonable; illogical
sleeplessness; insomnia; wakefulness
invulnerability; immortality; insensibility to pain
economic slump; hard times; depression; recession
unsettled; uncertain; indefinite; unfixed; variable; irregular; changeable
sleeplessness; insomnia; wakefulness
unreliable; uncertain; indefinite; unclear
unclean; dirty; unsanitary; filthy
inexperienced; unfamiliar (with); unversed; lacking experience
unknown; unidentified; unspecified
ominous; sinister; unlucky; inauspicious
discord; (on) bad terms (with)
inequality; unfairness
discontent; dissatisfaction; complaint; grievance
non-confidence; lack of confidence
emergency landing; forced landing; crash landing
heart failure
persistence; fortitude; indomitability
poor health; ill health; unhealthy
irregular; unseasonable; changeable; unsettled; abnormal
unpopular
indecisive; irresolute; shilly-shally; vacillating
unprepared
arrhythmia; abnormal heartbeat
daring; fearless; intrepid; bold; tough
impure; adulterated; foul; mixed; dishonest
unclean; dirty; impure
constant; persistent; unremitting; ceaseless
discord; trouble; dissension; disagreement; friction; conflict; feud; bad terms
unforeseen; unexpected; sudden; accidental
everlasting; immortal; eternal; enduring; undying; imperishable
atomic; indivisibility
one's weak point
nonpayment; default
poor crop; bad harvest; crop failure
unhappiness; misfortune; ill luck
discord; dissonance; cacophony
unkindness; unfriendliness
unsuited; inappropriate; improper; undeserved
failure (e.g. of a bill, motion); falling through; rejection; miscarriage
inviolability; nonaggression; sacredness
lack of filial piety; disobedience to one's parents
dishonouring (a bill); dishonoring; bouncing (a cheque, check); non-payment
war renunciation; anti-war
lack of virtue; immorality; vice; depravity; unworthiness
unworthy (of one's father, teacher, etc.)
imbalance; disproportion; disparity; mismatch; asymmetry
determination; conviction
impartiality; neutrality; independence
real estate agent; realtor
(examination) failure; rejection; disqualification
irrational; illogical; unreasonable; absurd; inconsistent
absentee ballot; absentee voting
imbalance; lack of balance; lopsidedness; disproportion; inequality; disparity
omission; failure; incompleteness
undutifulness to one's parents; lack of filial piety
unnecessary; needless
suddenly; abruptly; unexpectedly
unwritten law; common law
reluctant; unwilling; involuntary; unintentional; unintended; unlooked-for; disappointing
pout; displeasure; ill humor; ill humour; sullenness
carelessness; inattention; thoughtlessness; negligence
non-inflammables; incombustible (usu. waste)
uncertain; unreliable; inauthentic; insecure
inferior goods; defective product; defective goods
nonprosecution; nonindictment
inadequacy; inappropriateness; unfitness; impropriety
of uncertain meaning; ambiguous; cryptic; nonsensical; incomprehensible; perplexing
missing (of a person); lost; unaccounted for; whereabouts unknown
lack of physical exercise; insufficient exercise; inactivity