When reading a book and you encounter unfamiliar words, the source that you should consult is a dictionary.
<h3>What is a Dictionary?</h3>
This refers to the academic resource that can be consulted to define words, give their correct pronunciation, etc.
Hence, we can see that your question is incomplete, so a general overview is given. You can use a dictionary to find the meaning of difficult vocabulary.
Read more about dictionary here:
brainly.com/question/2162261
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