cofferdam

"Separate the articles from the headings."

"The protective helmet was essential for the construction worker. "

"The temporary at the bakery was only there for the summer. "

"The aquifer's underwater supply of fresh water is crucial for the town's water system. "

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

"The birds had built an amazing structure out of sticks and various discarded items."

"He spread his newspaper on the table."

"To explain a chapter of the Bible."

"Construction is underway on the new bridge."

"The new lunchbox is watertight, so my sandwich won't get soggy if it rains. "

"The shipbuilder carefully inspected the new cargo ship before its first voyage. "

"The ship's bulkheads prevented water from flooding the entire vessel after hitting an iceberg. "