malignancy

"The teacher's encouraging words confirmed the student's resolve to study harder for the exam. "

"The teacher is requiring students to submit their essays by Friday. "

"The teacher determined the rules for the classroom project, setting clear limits on the length of presentations. "

"He said it with malevolence."

"The school bully was a malignant influence on the younger students. "

"His suspicious behaviour brought him to the attention of the police."

"My teacher explained the new math formula specifically for students in the advanced class. "

"He said he didn’t do it, but the evidence was otherwise."

"Computer users these days expect immediate results when they click on a link."

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

"His constant complaining about the homework diseased everyone in the study group. "

"The teacher was shocked by the student's depravity, evident in their repeated dishonesty in class. "