unbecomingly

from WordNet (r) 3.0 (2006)

unbecomingly
    adv 1: without decorousness [syn: {indecorously},
           {unbecomingly}] [ant: {decorously}]

from The Collaborative International Dictionary of English v.0.48

Unbecoming \Un`be*com"ing\, a. [Pref. un- not + becoming.]
   Not becoming; unsuitable; unfit; indecorous; improper.
   [1913 Webster]

         My grief lets unbecoming speeches fall.  --Dryden.
   [1913 Webster] -- {Un`be*com"ing*ly}, adv. --
   {Un`be*com"ing*ness}, n.
   [1913 Webster]