unreasonably

from WordNet (r) 3.0 (2006)

unreasonably
    adv 1: not in a reasonable or intelligent manner; "she reacted
           unreasonably when she learned she had failed" [ant:
           {reasonably}, {sanely}, {sensibly}]
    2: to a degree that exceeds the bounds or reason or moderation;
       "his prices are unreasonably high" [syn: {unreasonably},
       {immoderately}] [ant: {fairly}, {jolly}, {middling},
       {moderately}, {passably}, {pretty}, {reasonably}, {somewhat}]

from The Collaborative International Dictionary of English v.0.48

Unreasonable \Un*rea"son*a*ble\, a.
   Not reasonable; irrational; immoderate; exorbitant. --
   {Un*rea"son*a*ble*ness}, n. -- {Un*rea"son*a*bly}, adv.
   [1913 Webster]