[1] : The Collaborative International Dictionary of English v.0.48

prey \prey\, v. i. imp.  p. p. preyed; p. pr.  vb. n.
   preying. of. preier, preer, l. praedari, fr. praeda. see
   prey, n.
   to take booty; to gather spoil; to ravage; to take food by
   violence.
   1913 webster

         more pity that the eagle should be mewed,
         while kites and buzzards prey at liberty. --shak.
   1913 webster

   to prey on or to prey upon.
   a to take prey from; to despoil; to pillage; to rob.
       --shak.
   b to seize as prey; to take for food by violence; to seize
       and devour. --shak.
   c to wear away gradually; to cause to waste or pine away;
       as, the trouble preyed upon his mind. --addison.
       1913 webster
see also:
preyed preying prey to prey on to prey upon 

Prey >> P Words
Prey, definition of term: Prey
prey_pag1.html

Upon >> U Words
Upon, definition of term: Upon
upon_pag1.html

Look Upon >> L Words
Look Upon, definition of term: Look Upon
look+upon_pag1.html

Call Upon >> C Words
Call Upon, definition of term: Call Upon
call+upon_pag1.html

Agreed Upon >> A Words
Agreed Upon, definition of term: Agreed Upon
agreed+upon_pag1.html

Bear Upon >> B Words
Bear Upon, definition of term: Bear Upon
bear+upon_pag1.html

Bird Of Prey >> B Words
Bird Of Prey, definition of term: Bird Of Prey
bird+of+prey_pag1.html