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 (should be
       quoted  to  preserve  them from being taken as glob
       patterns), and all hash  table  elements  from  the
       corresponding  hash  table  matching these patterns
       are disabled.  Disabled objects can be enabled with
       the enable command.
