deucedly

from WordNet (r) 3.0 (2006)

deucedly
    adv 1: (used as intensives) extremely; "she was madly in love";
           "deadly dull"; "deadly earnest"; "deucedly clever";
           "insanely jealous" [syn: {madly}, {insanely}, {deadly},
           {deucedly}, {devilishly}]

from The Collaborative International Dictionary of English v.0.48

Deuced \Deu"ced\, a.
   Devilish; excessive; extreme. [Low] -- {Deu"ced*ly}, adv.
   Deuse