quinine

"The old book was covered in a fine layer of powder. "

"The box containing my old toys was stored in the attic. "

"The doctor diagnosed my cousin with malaria after he returned from a trip to Africa. "

"The water from the well was surprisingly colourless, almost like air. "

"The coffee bean contains caffeine, which is a stimulating alkaloid. "

"The student derived the answer to the math problem from the formula. "

"I brush my teeth regularly to prevent them from turning yellow."

"The main ingredient in Grandma's famous chocolate chip cookies is butter. "

"The doctor explained that quinine, a medicine used to treat malaria, is extracted from the bark of the cinchona tree. "

"The tomato plants had some kind of disease that left their leaves splotchy and fruit withered."

"My grandmother always adds a few dashes of orange bitters to her gin and tonic. "

"The storm during all night. "