marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"
making a false outward show; "a beggar's masquerade of wealth"
a party of guests wearing costumes and masks
pretend to be someone or something that you are not; "he is masquerading as an expert on the Internet"; "This silly novel is masquerading as a serious historical treaty"