In the midst of a grand library, a young girl named Maya discovered an ancient book hidden behind a shelf. The book was bound in worn leather and seemed to whisper secrets from the past. Curious, she opened it and was transported to a realm brimming with mythical creatures and profound wisdom. As she wandered through the pages, the words danced before her eyes, each line imbued with an ineffable enchantment. Maya realized that this book was not just a mere collection of stories, but a gateway to limitless adventures.

In this intriguing setting, the word 'ineffable' is used to describe the enchantment of the book. Which of the following best represents the meaning of 'ineffable' as used in this context?