had no idea
No tenía ni idea de quién era.
I had no idea who he was.
No tenía ni idea de dónde estabas.
I had no idea where you were.
Al principio, no tenía ni idea del porqué.
At first, I had no idea why.
No tenía ni idea que supieras tanto sobre esas cosas.
I had no idea you knew so much about those things.
— स्वदेस (2004)
El pobre chico no tenía ni idea de qué hacer.
The poor boy had no idea what to do.