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.
