Wordly Wise, Book 4 is made up of 24 lessons with approximately 16 words in each lesson. Words taught in Book 4 include notable, tremulous, pertinent, cower, humane, pensive, wheedle, extol, inoculate, languid, rue, arable, ignoble, and jubilant. Comprehension of the vocabulary words is facilitated and reinforced through the five different exercises repeated in each lesson and the chapter reviews. Grade 7.