ADJ
- face
- gas
- oxygen
- surgical
- Hallowe'en
VERB + MASK
- have on, wear
- put on
- pull off, remove, strip off, take off, tear off
- In the second part of the play, the actors take off their masks
PREP
- behind/beneath a/the ~
- Two eyes glared at him from beneath the mask
- in a/the ~
- two men in black masks
- ~ over
- She wore a mask over her face
ADJ
- blank, cold, expressionless, grim, rigid
- Her face was a blank mask as she answered my question
MASK + VERB
- slip
- For a moment her mask slipped, and I saw how scared she really was
PREP
- behind a/the ~
- Behind the mask of friendliness, I know he really dislikes me
- ~ for
- His fooling around is a mask for his lack of confidence
