This document discusses strategies for building vocabulary. It explains that communication relies on vocabulary and effective vocabulary enhances personal and professional lives. There are several lexical terms associated with language such as vocabulary, dictionary, thesaurus, lexicon, and glossary. A person's vocabulary is the set of words they are familiar with in a language and usually grows with age, serving as an important tool for communication. The document then provides ways to build vocabulary, including learning roots and prefixes/suffixes to determine word meanings, being actively receptive to new words, and using words frequently.