activity
advice
alert
attention
ban
banner
break
caution
cease
communication
desist
disallow
discontinue
do
doing
entry
finish
forbidden
futuristic
halt
hud
icon
information
interrupt
law
legal
mistake
notice
order
policy
problem
prohibited
prohibition
quit
restrict
restriction
risk
rule
safety
screen
security
sign
signal
stop
suspend
symbol
warning
word