a loose sleeveless outer garment
sth used to hide or keep secret
"He masked his disappointment"
"the mountain was clothed in tropical trees"
Tucking up..the ground under a cloak of snow.
出自： R. W. Emerson
She pretends to be a painter, but you have only to look at her work to realise it is a cloak for other activities.
出自： E. Waugh