the way that someone or something looks
appearance
hide something or keep information secret
conceal
something that is meant to be kept secret
confidential
a way to change your appearance to conceal identity, give (someone or yourself) a different appearance to conceal identity
disguise
an interesting or unusual device that has a special purpose
gadget
an important job or assignment
mission
an object that orbits a planet
satellite
not known or seen or not meant to be known or seen by others, not known or seen or not meant to be known or seen by others
secret
to move in a stealthy way, someone who informs or tattles on others
sneak
someone who watches a person or object in order to get secret information, they are often working for the government, work for a government or organisation by carefully observing to get secret information
spy
new devices or tools made by using scientific knowledge
technology
secret or disguised, to blend in with a certain group of people or a place
undercover
