abstract
arrest
background
barb
barbed
barbwire
barrier
border
boundary
cage
cell
close
concept
cord
crime
criminality
custody
danger
dangerous
detail
deterrent
element
enclose
grunge
grungy
guard
iron
jail
metal
object
old
pain
paper
prevent
prickle
prickly
prison
prohibited
protection
section
sharp
spike
spiky
steel
texture
textured
thorn
thorny
twisted
vintaget