If you unburden yourself or your problems to someone, you tell them about something which you have been secretly worrying about.
例句
The Centre became a place where many came to unburden themselves, to talk about their hopes and fears...该中心已经成了许多人前来倾诉心事、谈论心中希望与忧惧的地方。Somehow he had to unburden his soul to somebody, and it couldn't be to Laura...不管怎样，他需要找个人倾诉一番，而这个人不可能是劳拉。
英英词典释义
Adjective
1. not burdened with difficulties or responsibilities;
"unburdened by an overarching theory"- Alex Inkeles