To free from or cast out something objectionable or undesirable
Those, then, who had to hear penitents unburden their souls were driven to the use of Roman writers on the subject.
archdeacon hurried to his own territory, there to unburden his heart to his faithful partner.
unburden yourselves of the best songs you've written since the start.
On your debut, you set out your stall and unburden yourselves of the best songs you 've written since the start.