access
admission
allowed
area
authorization
authorized
background
ban
close
disallowed
do
enter
entrance
entry
forbidden
hazard
human
icon
industrial
keep
label
law
man
no
not
only
pedestrian
people
permission
personal
personnel
prohibited
prohibition
protection
restricted
restriction
rule
safety
security
set
sign
signal
staff
sticker
stop
symbol
traffic
trespassing
unauthorized
zone