access
ban
barbed
barrier
blue
border
closed
construction
enclosure
entrance
entry
fence
forbid
interdict
intruder
intrusion
iron
message
metal
modern
net
no
nobody
notice
persons
pictogram
prickly
private
prohibition
property
protect
protection
red
safety
security
sharp
sign
sky
space
stop
sunny
symbol
table
trespassing
unauthorised
warning
wavy
white
wire
work