access
admission
alert
allowed
area
authorised
authorized
background
ban
caution
closed
danger
disallowed
do
do not
do not enter
emblem
enter
entry
forbid
forbidden
hazard
illegal
illustration
label
law
no
no pass
no trespassing
not
only
pictogram
prohibit
prohibited
restricted
restriction
risk
rule
safety
security
sign
signage
sticker
stop
symbol
trespassing
unauthorized
warning
zone