ensured, guaranteed, assured
La police assura qu'elle tirerait l'affaire au clair.
The police assured us that they would get to the bottom of the matter.
Elle s'assura que personne ne pouvait la voir.
She made sure no one could see her.
Elle l'assura que tout allait bien.
She assured him that everything was fine.
Dan assura à Linda qu'il ferait tout son possible pour retrouver sa fille.
Dan assured Linda that he would do everything he could to find her daughter.