Strongly forbidden with 〜べからず
Grammar: Modality, Permission, Obligation, Prohibition » Prohibition
An old-fashioned way to strongly forbid an action is to add べからず after a verb. This form may be seen on signs, although it is more common to see 禁止.
When modifying a noun, べからざる is used.
See also
- To discourage (rather than prohibit) an action, 〜てはいけない is used.
- To prohibit (rather than simply discourage) an action, 〜てはだめだ is used.
