Falter (verb)

1. To hesitate or waver in making a decision or taking action.
2. To become weaker or less steady in movement or action.
3. To speak or perform in a hesitant or uncertain manner.

Origin:

Middle english: from old english fealtrian "stumble, totter", of germanic origin; related to dutch valteren "to totter" and german falten "to fold".

Examples:

1. He faltered in his decision.
2. She faltered in her steps.
3. He faltered in his speech.
4. She faltered in her performance.
5. He faltered in his resolve.