べからず

expression

must not; should not; do not

Formal, literary prohibition used at the end of a sentence. Equivalent to ～してはいけない in modern Japanese.

• ここに立たち入いるべからず。

  You must not enter here.

• この書しょ類るいを外がい部ぶに持もち出だすべからず。

  These documents must not be taken outside.

expression

cannot

Rare, formal or literary expression of impossibility. In modern Japanese, ～できない is far more common.

• この問もん題だいは解とくべからず。

  This problem cannot be solved.