How do I prevent the indexer from indexing specific words?
There’s a file called stopwords.txt in the conf directory inside the installation directory. The default file that comes with the distribution contains a list of about 400 English words like ‘the’, ‘they’, ‘their’, etc that are usually ignored by most search engines. You can modify the list as you wish. After changes to stopwords.txt, you have to run indexer.pl again.