This document discusses suffixes and their uses. It defines a suffix as a word part added to the end of a word to modify its meaning or usage. It provides examples of common suffixes that can change words from nouns to adjectives or verbs to other parts of speech. The document emphasizes that understanding suffixes can help students learn new vocabulary by analyzing unfamiliar words. It includes activities for students to practice identifying and applying suffixes. Understanding suffixes is important for building vocabulary and language skills.