How to say in Czech: They don’t know what he means by that.

English
don’t know what means by that.
Czech
Oni nevědí, co tím chce říct.
The end justifies the means.
What do you mean by that?
I don’t get what you mean.
How do you mean?
He knows what they did last year.
He knows what they did yesterday.
They don’t know what to do anymore.
They just don’t know what to say.
I didn’t mean to hurt you.
He knows what they think.

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