lockdown – n. a temporary state of restricted movement

code -- n. a set of letters, numbers, symbols, etc., that identifies or gives information about something or someone

screen – n. a large, thin piece of wood, paper, or cloth that is set in a frame and used to separate one room or part of a room from another

stool –n. a small seat that fits only one person and has not back or arms

discourage – v. to try to make people not want to do (something)