-athon
suffix uk/ -ə.θɒn/ us/ -θɑːn/
词缀，表示持续时间很久的活动（尤指慈善筹款活动）
added to the end of words referring to an activity or event, especially one that has been organized to raise money for charity, to show that it continues for a long time
a 24-hour dance-athon 24小时长时间的跳舞
a walkathon 步行马拉松