não sabia o que dizer

didn't know what to say

→ não
phrase Uncommon #12,019
didn't know what to say Used when someone is at a loss for words. The tense can change: não sei o que dizer means “I don't know what to say,” and não sabe o que dizer means “doesn't know what to say.”
PO: Quando ouvi a notícia, não sabia o que dizer.
EN: When I heard the news, I didn't know what to say.

O Tom não respondeu porque não sabia o que dizer.

Tom didn't reply because he didn't know what to say.

Eu não sabia o que dizer.

I didn't know what to say.

Tom não sabia o que dizer em seguida.

Tom didn't know what to say next.

Ele queria dizer algo para ela, mas não sabia o que dizer.

He wanted to say something to her, but he didn’t know what to say.

Eu sei que eu devia te dizer algo, mas não sabia o que dizer.

I know I should tell you something, but I didn’t know what to say.

Ela não sabia o que dizer para ele.

She didn't know what to say to him.

O Tom não respondeu porque ele não sabia o que dizer.

Tom didn't reply because he didn't know what to say.

Eu não sabia o que dizer, mas liguei para ela assim mesmo.

I didn’t know what to say, but I called her anyway.

Por estar tão feliz, ela não sabia o que dizer ao início.

Because she was so happy, she didn't know what to say at first.

Tom não sabia o que dizer a seguir.

Tom didn't know what to say next.

Não sabia o que dizer para ela.

I didn't know what to say to her.