unhash [ -adfms ] 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 regular or global  aliases.   The
       -s option causes unhash to remove suffix 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  ele-
       ments  of  the corresponding hash table with matching names will
       be removed.

unalias
       Same as unhash -a.

unfunction
       Same as unhash -f.
