tu lui diras

you will tell him/her

→ tu
phrase Rare #30,490
you will tell him/her Future tense of dire. Lui can mean to him or to her, depending on context.
FR: Tu lui diras la vérité demain.
EN: You’ll tell him the truth tomorrow.

J'ai rien à promettre, tu lui diras ce que tu voudras.

I have nothing to promise; tell him whatever you want.

— Tout sur ma mère (1999)

Tu lui diras que je pense à elle.

Tell her I'm thinking of her.

— Les Invasions barbares (2003)

Tu lui diras mon affection.

Tell him how much I love him.

— Guerre et Paix (1968)

Tu lui diras toi-même.

You will tell him yourself.

Tu lui diras tu as mal.

You’ll tell him where it hurts.

Qu'est-ce que tu lui diras?

What will you tell him?

Mais tu lui diras toi-même.

But you'll tell him yourself.

— Piège de cristal (1988)

Tu lui diras?

Will you tell him?

Qu'il commence par t'épouser, tu lui diras après.

Let him marry you first; then you can tell him.

— Moscou ne croit pas aux larmes (1980)

Tu lui diras pourquoi?

Will you tell him why?