Obreption

Ob*rep"tion (?), n. [L. obreptio, fr. obrepere, obreptum, to creep up to; ob (see Ob-) + repere to creep.] 1. The act of creeping upon with secrecy or by surprise. [Obs.] Cudworth.

2. (Scots Law) The obtaining gifts of escheat by fraud or surprise. Bell.