Russian-English translations for проговориться

• give away
  I didnt like that book, so I gave it away
  Who giveth away this woman to this man in Holy matrimony?
  He gave himself away with a stupid lie
• let out
  The students were let out of school early.
  If you go into the aviary, dont let out any of the birds!
  He let out the reins when they were a mile from the barn.
• let slip
  He finally let slip that they plan to take over the business.
• spill
  I spilled some sticky juice on the kitchen floor.
  Some sticky juice spilled onto the kitchen floor.
  He spilled his guts out to his new psychologist.