uncertainly

from WordNet (r) 3.0 (2006)

uncertainly
    adv 1: in an unsteady manner; "he walked unsteadily toward the
           exit"; "The wounded soldier was swinging unsteadily on
           his legs" [syn: {unsteadily}, {falteringly},
           {uncertainly}] [ant: {steadily}, {steady}]
    2: showing lack of certainty; "he paused uncertainly"

from The Collaborative International Dictionary of English v.0.48

Uncertainly \Un*cer"tain*ly\, adv.
   In an uncertain manner.
   [1913 Webster]