Serving to defend against harm or danger.

able to withstand fire or great heat. Make resistant to fire. make something fireproof.

structure with roof and walls. To construct a house, office, factory.

structure crossing obstacle. Structures built over rivers, roads so you can cross. form bridge over.

act of breaking free. To get away from a place where you are being kept.

under normal conditions.

To do something potentially dangerous or foolish.

in space separating things. In the space that separates two objects.

accept or yield to superior force or to authority or will of another person.

entered or recorded on official list or directory. To record your name on an official list; sign up.

outside. without it being case that. in absence of.

Act of moving with your legs at a slowish pace. move at regular pace by lifting and setting down each foot in turn.

person who lives somewhere permanently or on long-term basis. Trainee doctor who works/lives in a hospital.

That could happen or become reality.

full of people, leaving little or no room for movement. (Of a lot of people) to go together in small place.