secrecy

[1]	mystery , secretiveness , silence , concealment , confidentiality , stealth , secretiveness , surreptitiousness , privacy , furtiveness , covertness , clandestineness
[2]	in secrecy , privacy , privateness , secretly , mysteriously , concealment , confidentially , stealthily , secretively , surreptitiously , privately , furtively , covertly , clandestinely , sneakily