not a single word
Ella no pudo entender ni una sola palabra.
She couldn't understand a single word.
No hubo ni una sola palabra de agradecimiento por parte de ellos.
There wasn't a single word of thanks from them.
Escuchó con mucha atención para no perderse ni una sola palabra.
He listened very carefully so as not to miss a single word.
No creo ni una sola palabra que digas.
I don't believe a single word you say.
Jamás le creí ni una sola palabra.
I never believed a single word he said.
No entendí ni una sola palabra de lo que dijeron.
I didn't understand a single word of what they said.
Ella salió sin decir ni una sola palabra.
She left without saying a single word.