abstract
access
barbed
barricade
barrier
captive
captivity
cattle
close
closeup
confined
criminal
danger
entanglements
freedom
harrow
imprisoned
incarcerated
insurance
iron
isolated
jail
keep
lethal
mildew
monochromatic
mutilates
painful
pazor
perimeter
prickly
prison
prisoner
protect
protection
rust
rusty
security
separation
sharp
steel
trackshoes
trapped
trespass
white
wire