adulterants

"The school hired an inspector to check the safety of the playground equipment. "

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

"Her mental health is really affected by stressful environments."

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

"The family owns several, a small plot of land behind their house. "

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

"The flowers were artificial, and he thought them rather tacky."

"We could color the walls red."

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

"The nutritional value of the breakfast cereal is high, providing many essential vitamins. "

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

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