brave

"Her confidence in her ability to speak French helped her to participate more in class discussions. "

"The new student was intimidated by the size of the school and all the older students. "

"Even after failing the exam twice, she showed great fortitude and continued to study until she passed. "

"Many US colleges want to achieve superiority in the sport of football."

"The student was notorious for his disruptive behavior in class. "

"the most courageous person I have ever met"

"Bob showed great discretion despite his knowledge of the affair."

"Their encounter was a matter of chance."

"The teacher threw a challenge to the students: "Who can solve this difficult math problem?" "

"The student's essay demonstrated excellence in writing. "

"The presentation about the new school rules was very clear and easy to understand. "

"the performance of an undertaking or a duty"