This document discusses contextual clues, which are hints an author provides within a text to help define difficult or unusual words. It provides examples of made-up words like "gollygoop" and "pigglywiggly" and encourages analyzing the context of a sentence to determine the meaning of an unfamiliar word based on clues from the surrounding text. Readers are instructed to reread before and after an unfamiliar word, consider the meaning of surrounding words, and check if their guessed meaning makes sense in the context of the full sentence and passage.