to keep one's plans or intentions secret
seine Pläne oder Absichten geheim halten (seine Plaene oder Absichten geheim halten)
"During the negotiations, she kept her cards close to the chest."
"Während der Verhandlungen hielt sie ihre Karten nah am Körper." (Waehrend der Verhandlungen hielt sie ihre Karten nah am Koerper)
to improve one’s effort or performance
to punish someone without legal authority
feeling very sure of yourself
to queue in anticipation of something
to study very hard
to start life poor but become rich through hard work