adult
alone
bar
behind
block
border
building
cage
captive
captivity
cell
concept
crime
criminal
dark
despair
face
freedom
hand
hostage
human
incarcerated
iron
jail
justice
law
locked
male
martyr
men
mesh
metal
old
paint
people
person
prison
prisoner
protection
rust
safe
secure
security
shadow
steel
terrorism
two
vintage
war
young