corroborate

"It was an incident that he hoped to forget."

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

"The coach's pep talk confirmed the team's resolve to win the championship. "

"The witness gave testimony about what she saw during the schoolyard fight. "

"strengthen a muscle"

"She can bear witness, since she was there at the time."

"The teacher assigned additional homework for the weekend. "

"The bridge's sturdy support beams prevented the structure from collapsing. "

"There is no evidence that anyone was here earlier."

"strengthen a muscle"

"The witness's story corroborated the victim's account of the robbery. "

"My teacher made a statement about the importance of studying hard. "