to explain to him/her
Je voulais lui expliquer que j'étais désolé, que j'arrivais pas.
I wanted to explain to him/her that I was sorry, that I couldn't do it.
— Oh Boy (2012)
J'ai essayé de le lui expliquer.
I tried to explain it to him.
You have to explain everything to him.
Je veux lui expliquer tout ça.
I want to explain all of this to him.
— Astérix & Obélix : Mission Cléopâtre (2002)
Je vais aller derrière lui expliquer quelques petites choses.
I'm going to go behind him and explain a few things.
Quelqu'un devrait peut-être lui expliquer.
Someone should perhaps explain it to him.
— Peaky Blinders : L'Immortel (2026)
I tried to explain to him.
Oh, bon Dieu, comment vais-je pouvoir le lui expliquer ?
Oh, God, how am I going to explain it to him?
— Day Watch (2006)