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.
(..) you just come on by. I'll remember that. Hey, white boy! First time I ever seen you without a shave. - It's a disguise. - What did you do? Rob a bank? I took over the country. One-man coup. Thank you. I may even make you a sheriff (..)1974 The Gambler