a retrouvé, a recouvré
William regained some confidence.
William a repris confiance.
A boxer regained his consciousness ten minutes after he was knocked-out.
Un boxeur a repris conscience dix minutes après avoir été mis KO.
He has not regained his full strength.
Il n'a pas encore recouvré toutes ses forces.
— The Hobbit: The Desolation of Smaug (2013)
It looks like you've regained your confidence.
On dirait que tu as repris confiance en toi.