falter-v; 2 Senses

Sense Number 1: hesitate or stumble in action or purpose

Shogun Lodge, a winner of $4.64 million, appeared to suffer a massive heart attack
as he faltered and fell near the 1000-metre mark.
The screen went dark and she faltered as her eyes turned to the controls.
He faltered after the all star break. The team should have moved him.
Western Union has had major losses in recent years as its telex
business has faltered in the face of competition.
Liz's resolve never faltered.

VerbNet: modes_of_being_with_motion-47.3
FrameNet: NP
PropBank: falter.01
WordNet 3.0 Sense Numbers: 1, 2, 3

Sense Number 2: speak haltingly or weakly

He faltered for an instant; then went on with his speech.
Hannah faltered: I . . . I just don't know.

VerbNet: NM
FrameNet: NP
PropBank: NM
WordNet 3.0 Sense Numbers: 4