leach 
/ˈli:tʃ/ verb
leach·es; leached; leach·ing /ˈli:tʃ/ verb technical 1 [+ obj] : to remove (a chemical, a metal, etc.) from a substance by the action of a liquid passing through the substance
▪ Even a small amount of rain can leach the toxic material from the soil. : to release (a chemical, a metal, etc.) when a liquid passes through ▪ Certain kinds of treated wood can leach chemicals into the soil. 2 [no obj] of a chemical, a metal, etc. : to be removed from a substance by a liquid passing through the substance
▪ The chemical eventually leaches away from the soil.
▪ Even a small amount of rain can leach the toxic material from the soil. : to release (a chemical, a metal, etc.) when a liquid passes through ▪ Certain kinds of treated wood can leach chemicals into the soil.
▪ The chemical eventually leaches away from the soil.
