Retient (en. Holds back)

/ʁə.tjɛ̃/

Slang Meanings

To take something under one's elbow
He kept a joke under his elbow for the next meeting.
Il a retenu une blague sous le coude pour la prochaine réunion.
To have something in mind
She retained her friend's idea for her project.
Elle a retenu l'idée de son ami pour son projet.