secrecy
n
1 [U] keeping secrets; ability or tendency to keep secrets; state of being secret 保密; 保密能力
rely on sb's secrecy 信赖某人的保密能力
his obsessive secrecy about his work 他对工作的强迫性保密观念
The meeting was arranged with the utmost secrecy, ie very secretly. 会议绝对保密.
the secrecy that still surrounds the accident 对该事故仍讳莫如深.
2 (idm 习语) swear sb to secrecy =>swear.
I suggest that we ask users of this machine what they think about it. We can photograph them using it too. Then we can put their comments at the top of the advertisement in big print. We can bring in some humour too. People enjoy reading humorous ads.