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.
(..) That's the least of your problems. Crate up the armor and the rest of it. All right, let's finish up here. Set up Sector underneath the arc reactor, and I'm going to want this data masked. Recruit our top engineers. I want a prototype right away. Hey. You busy? You mind if I send you on an errand? (..)2008 Iron Man