what should be used when you dont know how to pronounce a word?

thesaurus
dictionary
an index on a textbook
a glossary

When you don't know how to pronounce a word, a dictionary or a glossary should be used to find the correct pronunciation. A dictionary will provide phonetic symbols or audio pronunciations that can guide you in pronouncing the word correctly. A glossary, on the other hand, may include pronunciation guides for specialized terms within a specific field or subject. An index on a textbook and a thesaurus are not likely to provide pronunciation information.