demostrarle

to show him/her, to prove to him/her

→ demostrar
demostr to prove, to demonstrate, to show + ar Infinitive + le his/her/your (body part), to someone
verb Rare #44,301
to show him/her, to prove to him/her The ending -le can also refer to one person addressed formally as you.
SP: Voy a demostrarle que tengo razón.
EN: I'm going to prove to him that I'm right.
Conjugation of demostrar
Indicative present
SingularPlural
Third demuestra demuestran
Subjunctive present
SingularPlural
Third demuestra demuestran
Imperative
SingularPlural
Second demuestra —
Third demuestre —
Indicative past
SingularPlural
Third demostró —
Indicative future
SingularPlural
First demostraré —
Subjunctive future
SingularPlural
First demostraré —
Past
Imperative present
SingularPlural
Second demuéstramelo —

Puedo demostrarle que alguien le está tomando el pelo.

I can prove to you that someone is pulling your leg.

— PK (2014)

O sea, que Eva no puede demostrarle a la policía que estuviste en París?

So Eva can't prove to the police that you were in Paris?

— Contratiempo (2017)

Le pareció una manera realmente excelente de demostrarle nuestro agradecimiento.

It seemed like a truly excellent way to show him how grateful we are.

Por favor, déjeme demostrarle que no estoy loca.

Please let me prove to you that I'm not crazy.

— Durante la tormenta (2018)

Así que voy a demostrarle de qué es capaz Egipto.

So I'm going to show him what Egypt is capable of.

— Astérix & Obélix : Mission Cléopâtre (2002)

Le disparé tres veces para demostrarle que no.

I shot him three times to prove him wrong.

— Carandiru (2003)