background
black
confidential
crime
curiosity
danger
disclose
discovery
door
expose
eye
eyeball
eyelash
fear
find
hide
hole
human
idea
illustration
information
key
keyhole
lock
look
mystery
naughty
peek
peep
peephole
person
privacy
safety
scout
secrecy
secret
security
see
sight
sneak
spectator
spy
through
transparent effect
view
watchful
witness