The term "vaporous" is employed across literary works to evoke a sense of ethereal transience and to describe both tangible and abstract phenomena. Writers use it to depict delicate, shifting atmospheres—transforming a volcanic plume into something almost magical [1] or shrouding mountain summits in elusive mists [2]—while also lending an intangible quality to ideals and moods, as when a character is enamored with a fleeting, ungraspable notion [3]. In scientific or descriptive passages, the word even underscores physical states, such as substances prone to a vapor-like condition under ordinary circumstances [4]. In every instance, "vaporous" imbues the narrative with a subtle interplay of clarity and obscurity, suggesting that which is both real and ineffable.