sustain

"Her confidence in her ability to speak French helped her to participate more in class discussions. "

"The hikers packed enough provisions, like dried fruit and nuts, to last for three days on the trail. "

"The accusation of cheating damaged the student's reputation at school. "

"The city came under sustained attack by enemy forces."

"My teacher made a proposition for a new class project: a school-wide recycling drive. "

"It was an experience he would not soon forget."

"The witness's statement corroborated the victim's account of the incident. "

"In order to destroy evil, we must first acknowledge its existence."

"The bicycle's gears are a complex mechanism that converts the rider's pedaling motion into forward movement. "

"The school's library, a large superstructure, is built on top of the main building's roof. "

"The earthquake shook the school building during recess, causing some minor damage. "

"The foundation of his institute has been wrought with difficulty."