How can word roots help a reader understand an unkown word?

Word roots can provide clues about the meaning of an unknown Word because they contain the basic part of a Word that gives it its meaning. By recognizing a familiar Word root within an unknown Word, a reader can make an educated guess about the Word's meaning based on their knowledge of other Words with the same root. This can help the reader infer the meaning of the unknown Word even if they have never encountered it before.