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]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]