tormentor

"He is a student of life."

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

"The bully and his friends were Maria's tormentors, always making fun of her in the school hallway. "

"The twins resemble each other."

"They carried an assortment of gardening implements in the truck."

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"Go easy on him: he is but a child."

"Is anyone here afraid of suffering hardship?"

"The professor provided an abstract of the lengthy research paper, summarizing the key findings. "

"My frustration grew as my teacher kept pointing out my mistakes in front of the class. "

"the performance of an undertaking or a duty"

"The Roman siege relied heavily on torments that hurled massive stones at the city walls. "