inform him
Pode avisá-lo de que chegamos?
Can you let him know we've arrived?
— O Senhor dos Anéis: A Sociedade do Anel (2001)
Tive a difícil tarefa de avisá-lo que iria repetir de ano.
I had the difficult task of informing him that he would be repeating the year.
— Relatos Selvagens (2014)
Tentei avisá-lo para salvá-lo.
I tried to warn him in order to save him.
— Durante a Tormenta (2018)
Ele é o melhor, mas tenho que avisá-lo não será uma luta justa.
He's the best, but I have to warn him it won't be a fair fight.
— Oppenheimer (2023)
We need to warn him.