To find relief and satisfaction in fully expressing one's thoughts or feelings, especially after holding them back; to unburden oneself.
经过长时间的沉默，他终于有机会在朋友面前一吐为快，心中的郁闷也随之消散。
After a long period of silence, he finally had the chance to unburden himself to his friends, and the gloom in his heart dissipated.
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