The Collaborative International Dictionary of English v.0.48:

Prender \Pren"der\, n. [F. prendre to take, fr. L. prehendere to
   take.] (Law)
   The power or right of taking a thing before it is offered.
   --Burrill.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

PRENDER or PRENDRE. To take. This word is used to signify the right of
taking a thing before it is offered,; hence the phrase of law, it lies in
render, but not in prender. Vide A prendre; and Gale and Whatley on
Easements, 1.