in·cog·ni·to
adjective: incognito
(of a person) having one’s true identity concealed.
adverb: incognito
in a way that conceals one’s true identity.
noun: incognito
plural noun: incognitos
an assumed or false identity.
Origin
mid 17th century: from Italian, literally ‘unknown’, from Latin incognitus, from in- ‘not’ + cognitus (past participle of cognoscere ‘know’).