moldboard

"to curve a line"

"To get a good grade on the test, you need to answer the questions properly. "

"The student adjusted her chair so she could see the board better. "

"The construction crew used a bulldozer to clear the overgrown area near the school playground. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"My grandparents were instrumental in founding the local community garden. "

"continuous firing leads the grooves of a rifle."

"Follow that car!"

"My brother is very cleanly; he always washes his hands before meals and keeps his room tidy. "

"Check the oil in your car once a month."

"The car was turning left at the intersection. "

"The waiter carried the trays of food smoothly, avoiding any spills. "