unshakeable

"I encouraged him during his race."

"The soldiers fired their arrows from the loopholes in the castle wall, protecting themselves from the enemy. "

"We will proceed with unfaltering courage, until we reach our goal or are defeated."

"I already have a son, so I would like to have a daughter."

"Despite the challenging exams, Sarah maintained an unwavering focus on her studies. "

"Her belief in her best friend's honesty was unassailable, even when faced with strong evidence to the contrary. "

"My argument for staying late was that I needed extra time to finish my project. "

"The resolute faced every obstacle with unwavering determination, never giving up on their goals. "

"She injured herself."

"Our history class project is to create a timeline of important events in World War II. "

"My sister reasoned that if she studied harder, she would get a better grade on her test. "

"Autumn succeeds summer."