to avoid revealing one's thoughts, circumstances, or plans

listen to the pronunciation of to avoid revealing one's thoughts, circumstances, or plans
الإنجليزية - الإنجليزية
keep one's cards close to one's chest

Abdullah has not yet revealed his choice for the No 2 post when he takes over as prime minister, preferring to keep his cards close to his chest.

to avoid revealing one's thoughts, circumstances, or plans
المفضلات