Obsidional is an adjective that means "of or relating to a siege." Some synonyms for this word include blockading, besieging, encircling, and encompassing. Other related words that could be used as synonyms include trapped, besieged, isolated, and under siege. These words serve to describe that something is under attack or that it has been cut off from the rest of the world. In some situations, the word obsidional may be used to describe the act of being confined or "encircled" in a particular place, which could be used interchangeably with "imprisonment," "incarceration," or "captivity." Whether in a literal or figurative sense, obsidional is a term that connotes confinement, restriction, and limitation.