Seeing this, I was so moved that I couldn't say a single word.

看到这里，我感动得一句话也说不出来了。

youdao

I couldn't understand a single word she said!

她讲的东西我一个字都听不懂！

《牛津词典》

"They don't say a single word to each other."—"How come?"

“他们相互不说一句话。”—“怎么会这样？”

《柯林斯英汉双解大词典》

The raven answers with a single word: "Nevermore."

VOA: special.2009.02.02

where the accent's totally different and I didn't understand a single word.

那里的口音完全不同，我一个词也听不懂。

语法和语调是关键 - SpeakingMax英语口语达人

This idea may be rooted in the Ancient Near Eastern political sphere in which sovereigns would single out vassals for the status of special property; and in fact the word used is a word we do find in Exodus.

这个观点也许根植在古代近东的政治氛围中,统治者会将纳贡者独立出来放在特有财产的地位上,并且实际上用在这里的词是我们在,出埃及记中的看到的词语。

耶鲁公开课 - 旧约导论课程节选

About the real-world ecological risks of genetically manipulated crops - not a single word.

BBC: Getting an appetite for biotechnology

The connection might perhaps be reduced to a single word, whether patronage, or atonement, or Medici.

ECONOMIST: Botticelli and his bankers

The best advice on saving for college, in a single word, is to save.

FORBES: Bad College Advice - Don't Save in Your Child's Name