一知半解 [ㄧ ㄓ ㄅㄢˋ ㄐㄧㄝˇ; yi1 zhi1 ban4 jie3]
  lit. to know one and understand half (idiom); a smattering of knowledge
  dilettante
  amateur
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  一知半解
  いっちはんかい
  adjectival nouns or quasi-adjectives (keiyodoshi)
  noun (common) (futsuumeishi)
  superficial knowledge
  half knowledge
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