[1] : The Collaborative International Dictionary of English v.0.48

uncertainly \uncer"tainly\, adv.
   in an uncertain manner.
   1913 webster

[2] : WordNet (r) 2.0

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 ant: steadily
     2: showing lack of certainty; "he paused uncertainly"
see also:
unsteadily falteringly steadily 

Uncertainly >> U Words
Uncertainly, definition of term: Uncertainly
uncertainly_pag1.html