不知 [ㄅㄨˋ ㄓ; bu4 zhi1]
  not to know
  unaware
  unknowingly
  fig. not to admit (defeat, hardships, tiredness etc)
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  知らず
  不知
  しらず
  noun, used as a suffix
  not having
  unaffected by
  conjunction
  [often as ~は知らず]
  aside
  I don't know about ...
  archaism
  [at the beginning of a sentence]
  I know not whether
  I know not if
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  不知
  不智
  ふち
  不知
  noun (common) (futsuumeishi)
  something unknown
  ignorance
  foolishness
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