surreption

from The Collaborative International Dictionary of English v.0.48

Surreption \Sur*rep"tion\, n. [L. surreptio, or subreptio. Cf.
   {Subreption}.]
   1. The act or process of getting in a surreptitious manner,
      or by craft or stealth.
      [1913 Webster]

            Fame by surreption got
            May stead us for the time, but lasteth not. --B.
                                                  Jonson.
      [1913 Webster]

   2. A coming unperceived or suddenly.
      [1913 Webster]