/ˈfɔːltə/
to speak in a way that shows that you are not confident
His voice faltered as he began his speech.
to become weaker or less effective 衰弱；衰退；衰落 SYN waver
The economy shows no signs of faltering.
经济没有衰退的迹象。
Her courage never faltered.
她从未气馁过。