1. 
2. 
[syn: unreasonably, immoderately]
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]
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]