negotiator

"The teacher offered to mediate the argument between the two students. "

"The divers encountered a huge school of mackerel."

"The union negotiates with the company for better salaries and benefits. "

"The students will discuss the history of the Roman Empire in their social studies class. "

"The online forum has a moderator who removes inappropriate posts. "

"The seamstress used a sturdy between to create a precise, even stitch on the thick upholstery fabric. "

"The students elected Sarah and Michael as their representatives to the school board. "

"He is a student of life."

"The school's student council is a company of dedicated students who organize events. "

"The student council organized a fundraising event for the school library. "

"The diplomat from France presented the new trade agreement to the international organization. "

"The dispute over who cleaned the kitchen last night led to a family argument. "