young; who has recently acquired a new status, who has newly become something (without being necessarily young in absolute terms)
“Il n'aime plus cette personne qu'il aimait il y a dix ans. Je crois bien : elle n'est plus la même ni lui non plus. Il était jeune et elle aussi ; elle est tout autre. Il l'aimerait peut-être encore telle qu'elle était alors.” — He no longer loves this person whom loved ten years ago. I quite believe it. She is no longer the same, nor is he. He was young and she also ; she is quite different. He would perhaps love her yet, if she were what she was then.
Inherited from Middle French jeune, from Old French juene, juefne, from Vulgar Latin *iŏvenem, from Latin iuvenem.