hinders

"You must do your homework before you can watch television."

"Pit row was abuzz with activity."

"He is a student of life."

"It frustrates me to do all this work and then lose it all."

"The student accomplished the difficult math problem. "

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

"A drought hinders the growth of plants."

"She is committing her child to the care of a trusted babysitter for the evening. "

"A big obstacle to understanding the manual was that it had been poorly translated from the Japanese."

"The long drought caused the farmer's crops to wither and die. "

"Participating in the school's debate club is an extracurricular activity. "

"The complicated instructions on the new software difficult me from completing the project on time. "