Falter

1. verb

   move hesitatingly, as if about to give way

   Similar: waver

2. noun

   the act of pausing uncertainly

   “there was a hesitation in his speech”

   Similar: hesitation, waver, faltering

3. verb

   be unsure or weak

   “Their enthusiasm is faltering”

   Similar: waver

4. verb

   walk unsteadily

   “The drunk man stumbled about”

   Similar: stumble, bumble