The word “deep” in literature is a remarkably versatile descriptor, employed to evoke both physical dimensions and abstract, emotional states. It can denote literal depth—as when ancient warriors are depicted striking foes in their deep repose ([1]) or describing a precipice’s profound gap ([2])—or suggest a resonant quality in sound, such as a deep, hollow voice calling for rescue ([3]). At the same time, “deep” conveys inner intensity or complexity: characters engage in deep meditation ([4]), experience deep sorrow ([5]), or harbor deep insights into life and government ([6]). Whether illustrating the hidden layers of nature, emphasizing a state of profound silence ([7], [8]), or hinting at unfathomable internal worlds, “deep” artfully bridges the tangible with the psychological across literary works ([9]).