a 'masked' ball [=a formal party for dancing at which people wear masks]
She 'masked' [='hid'] her anger with a smile.
The bank was held up by 'masked' robbers.
(..) with a key character for his story? He's already almost finished with it. He dug up some old town on the fringes of the park, created a horde of masked men to terrorize guests and proselytize-cum-advertise the coming of some end-all villain named Wyatt. That isn't Wyatt. (..)2016 TvShow: Westworld Title: Trace Decay Season: 1 Episode 8