alone
arrest
background
border
cage
communication
crime
danger
depression
dictatorship
emotional
enforcement
expression
fence
fingers
forbidden
freedom
hand
helpless
hold
jail
justice
loneliness
lonely
mental mind
mesh
metal
metallic
net
pain
prison
prisoner
prohibit
protection
punishment
restriction
rusty
sad
security
sign
slave steel
stress
struggle
symbol
trapped
violence
wall
wire
women