incognito - Dictionary definition and meaning for word incognito
consider the word reCOGNITiOn. INCOGNITO can be remembered as IN(-ve prefix)+reCOGNITiOn, i.e avoiding recognition among the public and to do that you conceal your identity or use an assumed name.
Cognition means knowledge. Incognito means without knowledge.
IN (NOT) + Cognition (Recognizable) -> Incognito - Not Recognizable.
almost every one will be using the google chrome's incognito window to watch porn, it doesn't come up in your browsers history.. i.e. your identity is safe/concealed