vaporous

This term carries a ghostly, ephemeral quality, suggesting something that is present but cannot be grasped or held. It evokes a sense of instability and transience, often associated with the coldness of morning fog or the fleeting nature of a dream. When applied to ideas or speech, it shifts from a physical description to a critical one. It implies a lack of concrete evidence or a failure to provide specific details, painting the subject as a hollow shell of a concept that evaporates under scrutiny.