arrest
barbed
barbed wire
barrier
blue
bond
boom
boundary
cable
cage oiseaux
confinement
constraint
crime
criminal
danger
deterrent
diagonally
enclosure
escape
fence
fencing
forbidden
frame
freedom
gaol
guard
hard
high
imprisonment
iron
jail
mesh
metal
metallic
no people
outdoors
pokey
prickle
prickly
prison
prison house
prohibition
protection
punish
punishment
razor wire
rows
security
separation
sharp
sky
spike
steel
sticker
striped
symbol
thorn
three
twisted
unfreedom
warning
wire