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Webster 1913 Edition

Adj.

Hesitating; trembling.

“With faltering speech.”

Milton.

–

Noun.

Falter; halting; hesitation.

–

Fal′ter-ing-ly

adv.

ppr.

Hesitating; speaking with a feeble, broken, trembling utterance; failing.

Noun.

Feebleness; deficiency.

faltering

faltering ‎(plural falterings)

hesitancy
- 2009 March 29, Barry Unsworth, “Never Far From Despair”, in New York Times:
  But it is the doubt thrown on the prospect of arrival, the falterings of purpose and belief, the renewals of hope that give the novel its drive and energy.