This is the 4422nd most frequent Chinese word.
振奋
"振奋" means "to inspire" or "to uplift."
In this sentence, 振奋 (uplift/encourage) serves as a verb describing the emotional reaction of excitement and encouragement caused by an inspiring event.
看到优秀运动员的表现，他感到非常振奋。
He felt greatly uplifted by witnessing the performance of outstanding athletes.
Here, 振奋 (uplifted) functions as an adjective, characterizing a positive state of mind necessary to confront difficulties.
振奋的精神是面对挑战的重要武器。
An uplifted spirit is an essential weapon in facing challenges.
In this context, 振奋 (motivated/uplifted) acts as a verb indicating the action of boosting the students' determination through encouraging words.