Use 'permeable' when describing materials like fabrics, rocks, or membranes that liquids or gases can go through. Cotton clothing is permeable, making it breathable.
Pro Tip 2/3
Environmental Focus
'Permeable' often relates to environmental science, such as soil and water systems. Permeable rock layers affect groundwater flow.
Pro Tip 3/3
Physical Property
Remember that 'permeable' is a physical property; it describes an object's characteristics, not its function. A permeable jacket isn't necessarily waterproof.