wusste nicht, was

didn't know what

→ wissen
phrase Uncommon #18,717
didn't know what Used before a clause or on its own when the thing being asked about is clear from context.
GE: Ich wusste nicht, was ich sagen sollte.
EN: I didn't know what to say.

Tom wusste, dass etwas in der Kiste war, aber er wusste nicht, was.

Tom knew there was something in the box, but he didn’t know what.

Ich wusste nicht, was Tom vorhatte.

I didn't know what Tom was planning.

Die Mutter wusste nicht, was sie mit ihrem Sohn machen sollte.

The mother didn’t know what to do with her son.

Ich wusste nicht, was gerade passierte.

I didn’t know what was happening.

Tom wusste nicht, was ich zu tun versuchte.

Tom didn't know what I was trying to do.

Sie wusste nicht, was sie ihm sagen sollte.

She didn't know what to say to him.

Ich wusste nicht, was Tom las.

I didn’t know what Tom was reading.

Tom wusste nicht, was Maria suchte.

Tom didn’t know what Maria was looking for.

Tom wusste nicht, was wirklich vor sich ging.

Tom didn’t know what was really going on.

Sie wusste nicht, was sie wollte.

She didn't know what she wanted.

Ich wusste nicht, was gerade geschah.

I didn't know what was happening.

Maria wusste nicht, was sie sagen sollte.

Maria didn't know what to say.

Ich wusste nicht, was hier gespielt wird.

I didn't know what game was being played here.

— Reservoir Dogs - Wilde Hunde (1992)

Tom wusste nicht, was Maria davon hielt.

Tom didn't know what Maria thought of it.

Tom wusste nicht, was vor sich ging.

Tom didn't know what was going on.

Sie wusste nicht, was sie machen sollte.

She didn't know what to do.