abstract
area
background
barbed
barbed fence
barbed wire
barrier
border
boundary
camp
color
current
cut
detain
deterrent
electricity
emotion
farm
fence
grass
landscape
material
medium voltage
metal
open
outdoors
pasture
pole
prison
protection
punishment
refugee
safety
scene
scenery
security
sharp
tension
torture
trespass
trust
war
wire
wire fence