Seepage
(noun)
The slow, gradual flow or leakage of a liquid, gas or other substance through a porous material or crack.
Origin:
From the verb "seep" meaning to flow out or to percolate.
Examples:
- Seepage from the dam caused extensive damage downstream.
- The seepage of water through the walls can lead to mold growth.
- Seepage from the oil pipeline was discovered after an oil slick appeared on the surface of the water.
- Seepage of gas from underground reservoirs can be used for energy production.
- Seepage of chemicals from landfills can contaminate groundwater.