• to unbend one's mind, to unbend oneself
• to command oneself, to hold in, to hold one's hand, to keep one's countenance, to keep one's feelings in check
• personal, private, unofficial
• privacy, seclusion, sequestration, solitariness, solitude
• black hole, cell, cells
• in private, in private life
• inside dope, inside information
• to give private coaching