late 14c., "to stagger, totter," of unknown origin, possibly from a Scandinavian source (compare Old Norse faltrask "be burdened, hesitate, be troubled"), or else a frequentative of Middle English falden "to fold," influenced by fault (but OED rejects any direct connection to that word). Of the tongue, "to stammer," mid-15c. Related: Faltered; faltering.
中文解释
Falter: 扶好他，防止他跌倒，因为他----蹒跚，摇晃。2. perhaps from the verb fold (which was occasionally used of the faltering of the legs or tongue) + -ter as in totter.3. fold => falter. 形容舌头或者腿被卷住了或缠住了的情形。4. f（方向）+ alter（v 改变）－总是改变方向－蹒跚、摇晃；踌躇、犹豫。
实用例句
1. Investment could dry up and that could cause the economy to falter.
投资可能会中断，而这会引起经济衰退。
来自柯林斯例句
2. His voice began to falter.
他的声音开始发颤.
来自《简明英汉词典》
3. There was a falter in his voice.
他的言语支吾.
来自《现代英汉综合大词典》
4. The car was out of sight around a bend in moments, but the engine did not falter or slow down.
汽车片刻间便转弯不见了踪影，但动力丝毫未减。
来自柯林斯例句
5. The queen leaned forward with a ting falter of her stout body.