prodigally

from WordNet (r) 3.0 (2006)

prodigally
    adv 1: to a wasteful manner or to a wasteful degree; "we are
           still prodigally rich compared to others" [syn:
           {wastefully}, {prodigally}]

from The Collaborative International Dictionary of English v.0.48

Prodigally \Prod"i*gal*ly\, adv.
   In a prodigal manner; with profusion of expense;
   extravagantly; wasteful; profusely; lavishly; as, an estate
   prodigally dissipated.
   [1913 Webster]

         Nature not bounteous now, but lavish grows;
         Our paths with flowers she prodigally strows. --Dryden.
   [1913 Webster]