indignant

"You need to control your anger."

"Injustice is a heinous wrong."

"My brother flunked biology because he cheated on his mid-term."

"My friend told me there was something in the box, but I didn't know what it was yet. "

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

"My sister is very helpful, especially when it comes to organizing things. "

"All he had to show for four years of attendance at college was a framed piece of paper."

"He is a student of life."

"The teacher accused the student of cheating on the test. "

"The solution was very unjust."

"When the teacher unfairly accused him of cheating, Mark felt a surge of indignation. "

"The carnival games were unfairly difficult, and hardly anybody won a prize."