disconcerted

"He is a student of life."

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

"She consciously made the effort to smile at her coworker, even though she was feeling stressed. "

"The new schedule caused confusion among the students. "

"He raised his hand to make his announcement and said "Excuse me everyone, I have an announcement to make."

"The teacher embarrassed the student by publicly calling out a wrong answer during the quiz. "

"The heavy rain was unexpected; we had planned a picnic in the park. "

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

"The news of the factory closing distressed many of the town's residents. "

"The strong wind disarranged the papers on my desk. "

"The chess master's clever strategy completely discomfited his opponent, forcing him to resign after only fifteen moves. "

"Despite the noisy classroom, Sarah maintained her composure and answered the difficult question correctly. "