jamás había visto

had never seen

→ jamás
phrase Uncommon #11,945
had never seen Used to emphasize that something had not been seen at any time before a point in the past. It is stronger than simplemente “nunca había visto.”
SP: Jamás había visto una multitud así.
EN: I had never seen a crowd like that.

Tom jamás había visto a María tan enojada.

Tom had never seen Maria so angry.

Jamás había visto tan feliz a mi hermana.

I've never seen my sister so happy.

Creo que jamás había visto a un pirata tan mono.

I don't think I've ever seen such a cute pirate.

Él jamás había visto a un niño tan malo.

He had never seen such a bad child.

Jamás había visto una multitud así.

I had never seen a crowd like that.

Jamás había visto tal fuerza.

I had never seen such strength.

Jamás había visto uno.

I had never seen one before.

— El castillo en el cielo (1986)

Tom jamás había visto antes a una chica tan bella como Mary.

Tom had never seen a girl as beautiful as Mary before.

Jamás había visto tantos coches parados.

I had never seen so many cars stopped.

Jamás había visto el mar.

I had never seen the sea.

Jamás había visto una vista más bella.

I had never seen a more beautiful view.