unwarrantably

from WordNet (r) 3.0 (2006)

unwarrantably
    adv 1: in an unwarrantable manner or to an unwarranted degree;
           "in this painting, the relationship of the upper part of
           the body to the lower is uneasy and the right thigh seems
           unwarrantably stressed"

from The Collaborative International Dictionary of English v.0.48

Unwarrantable \Un*war"rant*a*ble\, a.
   Not warrantable; indefensible; not vindicable; not
   justifiable; illegal; unjust; improper. --
   {Un*war"rant*a*ble*ness}, n. -- {Un*war"rant*a*bly}, adv.
   [1913 Webster]

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