falteringly

from WordNet (r) 3.0 (2006)

falteringly
    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}]

from The Collaborative International Dictionary of English v.0.48

Faltering \Fal"ter*ing\, a.
   Hesitating; trembling. "With faltering speech." --Milton. --
   n. Falter; halting; hesitation. -- {Fal"ter*ing*ly}, adv.
   [1913 Webster]

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