abstract
apart
background
black
break
chain
communication
concept
connect
connection
crash
damage
dangerous
defect
detach
disconnected
element
failure
freedom
graphic
icon
illustration
insecure
iron
isolated
line
linked
metal
necklace
protection
relations
safety
secure
security
separate
shadow
shape
sign
split
steel
strength
strong
symbol
unlink
unlinking
unsafe
weak
weakness
wreck