The journalist traveled the city 'disguised as' [=dressed like; pretending to be] a beggar.
She 'disguised' herself 'as' a musician to get into the concert hall early.
He tried to 'disguise' his voice on the phone but I could tell it was him.
(..) The masks were ingenious. It was strange to suddenly see your face everywhere. Conceal me what I am, and be my aid... ...for such disguise as haply shall become the form of my intent. - . - Viola. - I don't understand. - What? (..)2005 V for Vendetta