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。
英汉词典释义
vt.
卸去负荷
He unburdened a horse of its load.他卸下马背上的货物。
吐露心事, 消除(思想、心灵上的)负担
He unburdened himself of his secret to me.他向我倾诉了心中的秘密。