宣泄 (xuān xiè): 排水 （ 水を引くこと ）

After days of heavy rain caused the reservoir water level to rise rapidly, engineers opened the gates overnight to drain the excess floodwater into the downstream riverbed to relieve pressure on the dam.

The doctor suggested he keep a diary every day to vent his worries and anxiety, which would help relieve the depression that had built up over a long time.

The factory secretly discharged untreated wastewater into a nearby small river, causing the water to turn black and stink, and killing large numbers of fish and shrimp.

He ran desperately and shouted loudly on the field, using exercise to release the enormous pressure from work, and felt much more relaxed after returning home.