DELETE - delete variable or named command.

$*$DeLeteCommand name: deletes the user-defined command with the given name. (You can define commands using the $*$COMMAND directive). EXEC does not issue any kind of message if the specified command does not exist.
$*$DeLeteVar name: deletes the user-defined variable with the given name. (Such variables can be created with $*$SEt or $*$IniT.)