What is the solution in frindle?

In "Frindle" by Andrew Clements, the solution revolves around the protagonist, Nick Allen, who creates a new Word, "frindle," to mean pen. Despite initial resistance from his teacher, Mrs. Granger, the term gains popularity and becomes widely accepted. The story highlights themes of creativity, the power of language, and how one person's idea can inspire change, ultimately leading to a broader acceptance of the Word in culture.