Root words, suffixes, and prefixes work together to create complex words. Help boost your students' understanding of word parts and how they relate to word meaning with this fifth- and sixth-grade grammar worksheet, in which they identify and define roots, suffixes, and prefixes. For additional practice, check out Root Word, Suffix, and Prefix Review #2, Root Word, Suffix, and Prefix Review #3, and Root Word, Suffix, and Prefix Review #4.