She glanced up to find him watching her with masked emotion.
However, she's attacked by the masked assailant.
No longer a tyrant of Ezzelinos stamp, he reigned by intelligence and terrorism masked beneath a smile.
Potassium gives a blue-violet flame which may be masked by the colorations due to sodium, calcium and other elements.
The equability of heat throughout the day is masked and relieved by the afternoon sea breezes.