demoralizing

"The long, difficult math problem disheartened the student, taking away their confidence to try more challenging questions. "

"Hooligans destroy unprovoked."

"The constant noise from the construction site made it hard to concentrate on my homework. "

"My daughter's teacher is very kind and helpful. "

"The weather was extremely hot today; we stayed inside all afternoon. "

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

"The team's morale was high after winning the championship. "

"He is a student of life."

"The negative comments from the teacher dishearten the student, making her lose her motivation to study. "

"The politician received a lot of public criticism for his controversial stance on the issue."

"The explanation was long and drawn-out."

"The school is located just outside the town, without the main shopping area. "