stanch

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

"He wishes to accumulate a sum of money."

"Please extinguish your cigarette before entering the building. "

"He spread his newspaper on the table."

"The floodgate at the dam was opened, releasing a controlled flow of water into the irrigation canals. "

"The volunteers worked tirelessly to improve the content."

"The school's new addition includes a modern necessary. "

"The firefighters rescued a cat from the burning building. "

"We need some sort of principles to reason from."

"The newspaper claims a leaked confidential report by the government admits to problems with corrupt MPs."

"The carpenter built a new wooden bookshelf for my bedroom. "

"the performance of an undertaking or a duty"