abstract
alarm
alert
attention
background
badge
ban
blank
caution
clean
communication
danger
design
empty
forbid
forbidden
glossy
graphic
hazard
icon
illustration
indication
information
isolated
mark
no
notice
pictogram
prevent
prohibited
protection
protest
public
red
reflection
restrict
risk
safety
shadow
shiny
sign
signal
stop
symbol
template
warning
white