adulterant

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The purity of the water was important for the healthy growth of the plants in the school garden. "

"The teacher's smile was a significant of approval for my hard work. "

"The company adulterates its juice by adding water, making it less flavorful and nutritious. "

"The intricate making of the model airplane showcased the student's skill. "

"The box contained old photographs. "

"The sudden forest fire started a brand that quickly spread across the dry landscape. "

"My dad made a strong coffee before going to work. "

"to reduce weight, speed, heat, expenses, price, personnel etc."

"By now, you must surely know which is which."

"The cheap for the used textbooks was surprisingly low, considering their condition. "

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