abstract
away
background
ban
caution
closeup
cross
design
do
dog
ecology
field
floral
foot
forbidden
garden
grass
green
ground
icon
instruction
keep
lawn
meadow
natural
nature
no
nobody
not
notice
ornament
park
pattern
plant
plate
pointer
prohibited
prohibition
protection
restriction
school
sign
silhouette
spring
step
stop
summer
symbol
walk
warning