background
barrier
behind
black
border
cage
chain
child
children
concept
crime
criminal
danger
escape
fear
fence
grid
grunge
hand
hands
help
holding
hostage
human
illegal
iron
jail
justice
kid
link
lonely
mesh
metal
people
person
prison
prisoner
protect
punishment
refugee
sad
safety
security
social
steel
violence
white
wire
young