unbosom

verb3

1. •
   (no longer used) To tell someone about (one's troubles), and thus obtain relief.

   • Their several counsels they unbosom shall To loves mistook, and so be mock'd withal Upon the next occasion that we meet, With visages displayed, to talk and greet. — 1594
2. •
   [with oneself] (no longer used) To free (oneself) of the burden of one's troubles by telling of them.

   • Watt was not the first to whom Mr Graves had unbosomed himself, in this connexion. For he had unbosomed himself to Arsene, many years before […] — 1953
3. •
   (no longer used) To confess a misdeed.