disable [ -afmr ] name ...
       Temporarily  disable the named hash table elements.
       The default is to disable builtin  commands.   This
       allows you to use an external command with the same
       name as a builtin command.  The  -a  option  causes
       disable  to  act  on aliases.  The -f option causes
       disable to act on shell functions.  The -r  options
       causes  disable  to act on reserved words.  Without
       arguments all disabled hash table elements from the
       corresponding  hash table are printed.  With the -m
       flag the arguments are  taken  as  patterns  (which
       should  be  quoted  to prevent them from undergoing
       filename expansion), and all  hash  table  elements
       from  the  corresponding  hash table matching these
       patterns are disabled.   Disabled  objects  can  be
       enabled with the enable command.
