reciprocated

"The teacher organized a friendly game of basketball after school. "

"0.5 is the reciprocal of 2."

"The student walked forwards to the front of the classroom to receive her award. "

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

"After her brother broke her favorite toy, she decided to retaliate by hiding his video game controller. "

"My teacher asked for a response to the question, so I wrote an answer on the board. "

"The two friends were reciprocating favors: she helped him with his math homework, and he helped her with her English essay. "

"The battleship had three backwards guns at the stern, in addition to the primary complement."

"The contract requires that the party of the first part pay the fee."

"The goalie is defending the net from the opposing team's shots. "

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

"All in all, it was an even exchange."