frustrated

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

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

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

"His lack of respect disappointed her."

"The teacher was reprimanded for depriving students of recess time. "

"The student's discontent with the course material was evident in her low grades. "

"My brother was dissatisfied with his school report because he didn't get the marks he wanted. "

"This flow chart represents the assignment of tasks in our committee."

"The constant buzzing of the phone was a major annoyance. "

"His lack of respect disappointed her."

"My frustration grew as my teacher kept pointing out my mistakes in front of the class. "

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