access
addicted
addiction
alert
attention
authorization
caution
close
danger
dangerous
denied
disallowed
do not enter sign
enter
entry
error
fault
forbid
forbidden
halt
interface
law
man
no
no entry
no entry sign
not
not allowed
person
prevention
prohibit
prohibited
prohibition
protect
protection
restrict
restriction
restrictive
safety
secured
security
sign
signal
stop
street
symbol
terminate
termination
traffic
warning