Hide; conceal; mask; blind; front; cover.
Concealment by some means that alters or obscures the appearance; a device or stratagem used for concealment. Camouflage is a life saving technique used for instance by soldiers in war or by animals of pray. They take over an appearance that resembles the environment, by doing that the 'actor' and the 'surrounding' become one and therefor invisible. Camouflage protects.