The word jià kōng literally combines jià (to prop up, support, or set up) and kōng (empty, void, or air), evoking the image of 'propping something up in midair'—a structure with no real foundation or support. Figuratively, it means to sideline someone or something by removing their actual authority or influence while maintaining their nominal position, like placing a leader 'in the air'—visible but powerless.

This term is most common in political, organizational, or corporate contexts where formal titles remain but decision-making power has been transferred elsewhere. It implies intentional marginalization rather than simple dismissal; the person or role is retained in appearance only. Though occasionally used in engineering or physics to describe physically suspended structures, its dominant modern usage is metaphorical and sociopolitical.