Denshi Jisho — Online Japanese dictionary

不知 ふち 1: something unknown;
2: ignorance; foolishness
Noun 
不図 ふと suddenly; casually; accidentally; incidentally; unexpectedly; unintentionally
Ateji (phonetic) reading, Adverb, Usually written using kana alone 
不圖 ふと suddenly; casually; accidentally; incidentally; unexpectedly; unintentionally
Ateji (phonetic) reading, Out-dated kanji, Adverb, Usually written using kana alone 
不斗 ふと suddenly; casually; accidentally; incidentally; unexpectedly; unintentionally
Ateji (phonetic) reading, Adverb, Usually written using kana alone 
不二 ふに advaitam (non-duality)
Noun, Buddhist term 
不磨 ふま permanence; immortality
Noun 
不味 ふみ distaste; unsavoriness; unsavouriness
Na-adjective, Noun 
不予 ふよ indisposition; emperor's illness; unhappiness
Noun 
不理 ふり unreasonable; irrational
Noun 
不離 ふり inseparability
Noun 
不間 ぶま clumsiness; stupidity; blunder
Na-adjective, Noun 
不安 ふあん anxiety; uneasiness; insecurity; suspense
Common word, Na-adjective, Noun 
不運 ふうん unlucky; misfortune; bad luck; fate
Common word, Na-adjective, Noun, No-adjective 
不穏 ふおん unrest; turbulence; impropriety
Common word, Na-adjective, Noun 
不快 ふかい unpleasant; displeasure; discomfort
Common word, Na-adjective, Noun 
不吉 ふきつ ominous; sinister; bad luck; ill omen; inauspiciousness
Common word, Na-adjective, Noun 
不屈 ふくつ persistence; fortitude; indomitability
Common word, Noun, No-adjective, Na-adjective 
不潔 ふけつ unclean; dirty; filthy; impure
Common word, Na-adjective, Noun 
不孝 ふこう undutifulness to one's parents; lack of filial piety
Common word, Na-adjective, Noun 
不幸 ふこう unhappiness; sorrow; misfortune; disaster; accident; death
Common word, Na-adjective, Noun 
不作 ふさく poor crop; crop failure
Common word, Noun 
不在 ふざい absence
Common word, Noun, No-adjective 
不信 ふしん unfaithfulness; insincerity; perfidy; mistrust; distrust; discredit
Common word, Noun, No-adjective 
不審 ふしん incomplete understanding; doubt; question; distrust; suspicion; strangeness; infidelity
Common word, Na-adjective, Noun 
不振 ふしん dullness; depression; slump; stagnation
Common word, Na-adjective, Noun 
不正 ふせい injustice; unfairness; iniquity; impropriety; irregularity; dishonesty; illegality; fraud
Common word, Na-adjective, Noun 

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