Compounds of 不

• 不
  (pref) un-
  non-
  negative prefix
• 不
  (pref) (1) un-
  non-
  (2) bad ...
  poor ...
• 不安
  (adj-na,n) anxiety
  uneasiness
  insecurity
  suspense
  (P)
• 不意
  (adj-na,n,adj-no) sudden
  abrupt
  unexpected
  unforeseen
  (P)
• 不易
  (adj-na,n) constancy
  immutable
• 不為
  (adj-na,n) disadvantageous
  harmful
  unprofitable
• 不一
  (adj-na,n) Very sincerely yours
• 不印
  (n) poor results
• 不運
  (adj-na,n,adj-no) unlucky
  misfortune
  bad luck
  fate
  (P)
• 不縁
  (n) divorce
  unrealized marriage (prospects)
  unrealised marriage
• 不乙
  (adj-na,n) Very Sincerely Yours
• 不穏
  (adj-na,n) unrest
  turbulence
  impropriety
  (P)
• 不可
  (n,n-suf) wrong
  bad
  improper
  unjustifiable
  inadvisable
  (P)
• 不快
  (adj-na,n) unpleasant
  displeasure
  discomfort
  (P)
• 不覚
  (adj-na,n) failure
  defeat
  mistake
  blunder
  negligence
  indiscretion
• 不学
  (adj-na) unlearned
  uneducated
• 不堪
  (adj-na,n) (obsc) incompetence
• 不間
  (adj-na,n) clumsiness
  stupidity
  blunder
• 不器
  (n) clumsiness
  unskillfulness
• 不期
  (n) unexpected
  accidental
• 不帰
  (n) rising no more (as in illness and death)
  returning no more
  dying
• 不起
  (n) rising no more (as in illness and death)
  returning no more
  dying
• 不軌
  (n) lawlessness
  violation of customs
• 不義
  (n,adj-no) (1) immorality
  injustice
  misconduct
  impropriety
  perfidy
  (2) adultery
  infidelity
  cuckoldry
  (3) (arch) murdering one's teacher or a government official
• 不吉
  (adj-na,n) ominous
  sinister
  bad luck
  ill omen
  inauspiciousness
  (P)
• 不急
  (adj-na,n,adj-no) in no hurry
  nonessential (industry)
• 不朽
  (n,adj-no) everlasting
  immortal
  eternal
  immortality
  imperishable
  (P)
• 不漁
  (n) poor catch
• 不況
  (adj-na,n,adj-no) recession
  depression
  slump
  (P)
• 不興
  (adj-na,n) displeasure
  ill humour
  ill humor