to do something secretly without their knowledge
etwas heimlich tun, ohne dass die Person es weiß (etwas heimlich tun, ohne dass die Person es weiß)
"She was talking about me behind my back."
"Sie sprach hinter meinem Rücken über mich." (Sie sprach hinter meinem Rücken über mich.)
to trust someone with something important
to start having doubts about a decision you have made
to raise a false alarm
to discuss something until a decision is reached
to place something or write something down
to say something openly or honestly that you’ve been hiding