interesting vocabulary words

speaking apparatus: is the tool people use in the machine to communicate with others and it is made as a kind of instant messaging/video conferencing.


Homelessness: expulsion from the underground environment and sent to the surface of the earth which means death.

hexagonal: it is a math term,is a polygon with six edges and six vertices.  but in the story it is the shape of the room in the machine. the room is very small and looks like a cell from outside.