no dicen nada

they don't say anything

→ no
phrase Rare #48,433
they don't say anything Spanish uses negative concord: “no” and “nada” together express a single negation. The subject “they” is understood from the verb form.
SP: Cuando les pregunto, no dicen nada.
EN: When I ask them, they don't say anything.

¿Por qué no dicen nada?

Why aren’t they saying anything?

— El sacrificio (1986)

Los periódicos no dicen nada.

The newspapers don't say anything.

— Río Místico (2003)

No dicen nada.

They don't say anything.

— Nadie sabe (2004)

¿Por qué de mí no dicen nada?

Why don’t they say anything about me?

— El Huésped (2006)

Pero--¿Y no dicen nada?

But—aren’t they saying anything?

— Il postino (1994)