faltered
v.
（嗓音）颤抖( falter的过去式和过去分词 );
支吾其词;
蹒跚;
摇晃;
例句:
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He finally faltered in the last game of a heroic match.
他在这场艰苦比赛的最后一局中踉跄结束。
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I have not faltered in my quest for a new future.
我对新的未来的追求从未动摇过。
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Family relations quickly disintegrated and the business ultimately faltered.
来自WSJ
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She faltered, and then her face crumpled once more.
她的声音颤抖起来，随后又露出一脸苦相。
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Stevick began, then faltered, unsure of his question.
来自NEWYORKER
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But Republican Party unity appears to have faltered.
来自VOA