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.

Fame by surreption got
May stead us for the time, but lasteth not.
B. Jonson.

2. A coming unperceived or suddenly.