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  dis-
       abled  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.
