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adj. δ֪�ģ�İ���ģ�ĬĬ���ŵ�
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n. alien��terra incognita��unknown quantity��unknown region
a. nameless��obscure��strange��unidentified

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a.   known

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1. Unknown so the sigh.
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2. Unknown to Death.
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3. A new day is unknown, you ready to discover it?
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n.
  1. an unknown and unexplored region
  2. anyone who does not belong in the environment in which they are found
  3. a variable whose values are solutions of an equation
adj.
  1. not known
  2. being or having an unknown or unnamed source
  3. not known to exist
  4. not famous or acclaimed
  5. not known before

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