pot‧ash /ˈpɒtæʃ $ ˈpɑː-/
noun [uncountable][
Date: 1600-1700;
Origin: pot + ash; because it was made by putting ash in water and letting it dry out in pots]
a type of potassium used especially in farming to make the soil better
[TahlilGaran] Dictionary of Contemporary English ▲