Falter
WordNet

noun


(1)   The act of pausing uncertainly
"There was a hesitation in his speech"

verb


(2)   Speak haltingly
"The speaker faltered when he saw his opponent enter the room"
(3)   Walk unsteadily
"The drunk man stumbled about"
(4)   Move hesitatingly, as if about to give way
(5)   Be unsure or weak
"Their enthusiasm is faltering"
WiktionaryText

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