keep something dark
US /kiːp ˈsʌmθɪŋ dɑːrk/
UK /kiːp ˈsʌmθɪŋ dɑːrk/

1.
garder quelque chose secret, ne rien dire à personne
to keep something secret; to not tell anyone about something
:
•
We need to keep this project dark until the official announcement.
Nous devons garder ce projet secret jusqu'à l'annonce officielle.
•
She asked me to keep her plans dark from her family.
Elle m'a demandé de garder ses projets secrets de sa famille.