Synonyms of 'stutter'
stammerDictionary, stumble, falter
I was trembling so hard, I thought I would stutter when I spoke.
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If your voice falters when you are speaking, you hesitate or pause, because you are unsure about what you are saying or are upset.
Her voice faltered and she had to stop a moment to control it.
Thesaurus for stutter from the Collins English Thesaurus
If someone has a stutter , they find it difficult to say the first sound of a word, and so they often hesitate or repeat it two or three times.