妖しい
怪しい
building
cable
camera
cctv
circuit
control
crime
cruise
danger
deck
deterrent
electric
electrical
equipment
examine
instrument
lens
looking
nobody
ocean
order
outdoor
outdoors
pole
power
privacy
private
protection
record
resident
safe
safety
sea
secrecy
security
ship
sky
spectator
spy
surveillance
suspicion
system
technology
television
video
warning
watching
white