Bad words” are nothing to be concerned about. Nevertheless, people’s hearts are hurt, damaged, and troubled by unjustified slander and bad words. This book provides an understanding of the mechanism of “bad words” that never disappear from society, even though we have been taught since childhood not to say them, and gently explains how to protect oneself from danger, which is important to learn because anyone can become a target, and how to think about turning bad words into one’s own strength.