The word "搞鬼" is formed through a verb-object compound structure, where the verb "搞" (gǎo), meaning "to do" or "to engage in," is combined with the object "鬼" (guǐ), which literally means "ghost" or "spirit." In this context, "鬼" is used figuratively to represent secretive, mischievous, or underhanded activities. Thus, the compound semantically conveys the action of "playing tricks," "being sneaky," or "carrying out deceitful schemes," with the metaphorical use of "鬼" adding a layer of negativity and hidden mischief to the straightforward action implied by "搞."