masking

详细解释:【计】 屏蔽, 掩蔽, 掩模
【化】 掩蔽; 隐蔽
【医】 掩蔽(声音或脑电波的), 掩蔽物(金属假牙的)

英语解释：

名词 masking:

the act of concealing the existence of something by obstructing the view of it同义词：cover, covering, screening