não entendeu nada

didn't understand anything

→ não
phrase Uncommon #8,864
didn't understand anything Literally means “didn't understand anything.” The verb can change with the subject and tense, as in não entendo nada (“I don't understand anything”) or não entende nada (“you/he/she don't/doesn't understand anything”).
PO: Ela não entendeu nada da explicação.
EN: She didn't understand anything from the explanation.

Então, não entendeu nada?

So, you didn't understand anything?

— Cinema Paradiso (1988)

Ele não entendeu nada.

He didn't understand anything.

Você não entendeu nada.

You didn't understand anything.

— Amores Brutos (2000)

E você não entendeu nada do que estava acontecendo?

And you didn't understand anything that was happening?

— Ирония судьбы, или С легким паром! (1976)

O sorriso idiota dele mostrava que não entendeu nada.

His idiotic grin showed that he hadn't understood anything.

Tom não entendeu nada.

Tom didn't understand anything.

O Tom não entendeu nada.

Tom didn't understand anything.

Tom disse que ele não entendeu nada.

Tom said that he didn't understand anything.

Ele não entendeu nada!

He didn't understand anything!

— A Noite Americana (1973)

Você não entendeu nada a respeito do Fukai.

You didn't understand anything about Fukai.

— Nausicaä do Vale do Vento (1984)