DELWORD(string,position[,count])

This function is a word-oriented version of DELSTR. It deletes the
substring of string which starts at the "position"th blank-delimited
word and is of "count" blank-delimited words. If there are not
"position" words in the string, or if count is 0, the string is
returned unchanged. The string deleted includes any blanks following
the final word deleted, but does not remove any blanks preceding the
first word deleted.