unhash [ -adfm ] name ...
       Remove the element named name from an internal hash
       table.   The  default  is  remove elements from the
       command hash table.  The -a option causes unhash to

       remove  aliases.   The  -f  option causes unhash to
       remove shell  functions.   The  -d  options  causes
       unhash to remove named directories.  If the -m flag
       is  given  the  arguments  are  taken  as  patterns
       (should  be  quoted) and all elements of the corre-
       sponding hash table with  matching  names  will  be
       removed.

unalias
       Same as unhash -a.

unfunction
       Same as unhash -f.
