Synonym: camouflage, cover, disguise. Antonym: unmask. Similar words: mass, mash, mast, smash, mason, massy, amass, unmask. Meaning: ['mæsk /mɑːsk] 
n. 1. a covering to disguise or conceal the face 2. activity that tries to conceal something 3. a party of guests wearing costumes and masks 4. a protective covering worn over the face. v. 1. hide under a false appearance 2. put a mask on or cover with a mask 3. cover with a sauce 4. shield from light.
n. 1. a covering to disguise or conceal the face 2. activity that tries to conceal something 3. a party of guests wearing costumes and masks 4. a protective covering worn over the face. v. 1. hide under a false appearance 2. put a mask on or cover with a mask 3. cover with a sauce 4. shield from light. 
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31. Her face was a blank mask as she answered my question.
32. Behind the mask of friendliness, I know he really dislikes me.
33. If you go out without a mouth mask, you'll probably catch your death of cold.
34. The enemy mask their enmity under an appearance of friendliness.
35. For a moment her mask slipped, and I saw how scared she really was.
36. Wood stains provide good protection but tend to mask the natural grain of the wood.
37. I've put some flowers in there to mask the smell.
38. You must wear goggles and a mask that will protect you against the fumes.
39. She had developed an outgoing personality to mask her deep insecurities.
40. He ripped away the mask of pretence which covered their activities.
41. The mask is left on for about 15 minutes while it sets to a rubbery texture.
42. The basic equipment consists of a plastic mask and a length of rope.
43. His mask of detachment cracked,(http://sentencedict.com/mask.html) and she saw for an instant an angry and violent man.
44. His fooling around is a mask for his lack of confidence.
45. Small children find it hard to mask their emotions.
46. A death mask of pieces badly assembled.
47. Veneers were used only to mask carpentry mistakes.
48. If man will strike, strike through the mask!
49. Remember mouthwashes only mask the underlying cause of halitosis.
50. The woman's face was drawn into pained mask.
51. Boldness is a mask for fear, however great. John Dryden 
52. Don't try and pull off your mask.
53. Reynard wears an oxygen mask and breathes pure air.
54. No one was fooled by the mask of rhetoric.
55. Delaney snapped on his gas mask.
56. Keep the gondola, the mask too.
57. He sulked, grateful only that he had not insisted on the iron mask, but had chosen the velvet one.
58. He could see Doyle's curly hair, but the man's face was hidden by the anaesthetist's mask.
59. The white, black, red face was surprised, just for a moment, then it settled into a closed mask.
60. He was holding, grabbing guys by the face mask, leg-whipping.