This document discusses how to identify the part of speech of words based on their endings and surrounding context. It provides examples of common endings for nouns, verbs, adjectives, and adverbs that indicate their part of speech. It also lists contextual clues like common words that precede or follow different parts of speech. The purpose is to explain how to determine if a word is functioning as a noun, verb, adjective, or adverb by analyzing its ending, context, and placement within a sentence.