falter


falter (http://definr.com/falter)

     n : the act of pausing uncertainly; "there was a hesitation in
         his speech" [syn: hesitation, waver, faltering]
     v 1: be unsure or weak; "Their enthusiasm is faltering" [syn: waver]
     2: move hesitatingly, as if about to give way [syn: waver]
     3: walk unsteadily [syn: stumble, bumble]
     4: speak haltingly [syn: bumble, stutter, stammer]