deteriorating

"The lack of sleep severely impaired her ability to concentrate in class. "

"As you are my inferior, I can tell you to do anything I want."

"The teacher explained the new math concept quickly. "

"In the cult of degenerates, acts of decency, kindness and modesty could be seen as acts of apostasy."

"She is getting her daughter a puppy for her birthday. "

"Abducting children is bad for mothers."

"My eyesight is getting worse, so I need new glasses for reading. "

"Quality of life is usually determined by health, education, and income."

"Lack of sleep can impair your ability to concentrate in class. "

"to deteriorate the mind"

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

"On a recent windy day, hundreds of visitors climbed wooden stairs to take pictures in front of the glacier."